A few quick responses to recurring questions: 1. The containers were opened regularly during the six weeks to mimic daily usage. (As I said, six weeks is a long but I hoped it would help produce more dramatic results) 2. Why no control? A good question, with a two-part, dull answer: - The coffee I used came from a 2kg bag so I could be confident it was the same roasting batch. I couldn’t reseal that batch. If I had used a retail type bag from that day I couldn’t be 100% sure it had come from exactly the same batch/blending session and it felt like introducing a variable. - The bigger idea of the testing was to look at the impact of broad technologies. Most resealable bags would work like displacement containers - so they’d work well, but not quite as well as vacuum storage. However, the differences in taste would be pretty minor. In the end my recommendations from each category as much reflect their taste impact as they do the broader experience of owning and using one. Hence I felt comfortable recommending the Airspace even though it wasn’t tested.

This guy could be talking about different kinds of dust he found on his hallway floor today and I would still watch.

me, sipping my reheated coffee made from preground coffee that I store in a tupperware container: ah, interesting

I would have loved to have seen a resealable bag and an open-air container or something to have been included in the test. Could be fun to see how much worth it would be to buy ANY for-coffee-crafted container of any kind versus just keeping the grounds in the bag or just keeping them in a place where some or a lot of air might come in contact with the beans.

I use brown beer bottles with vacuum wine stoppers, which works well, and there’s something rather satisfying about pouring coffee beans out of a glass bottle.

I bought an Airscape from my favourite local roaster at their recommendation and it works pretty well. They give a discount when I bring it in to get refilled, too, so it's pretty near paid for itself at this point. Like James says, I don't know if it's significantly better than a well-sealed bag, but it's durable and dark, and since the roaster will fill it directly (and will again post-Pandemic, I hope...) means I'm not generating a lot of plastic waste.

A method that I find works to keep the freshness longer is to store the coffees in smaller containers of maybe 100-200 grams each. The reason for this in my opinion is because you reduce the number of times each container is opened. With smaller containers, the container might only be opened 3-4 times as opposed to a larger container that might be opened 10-20 times which exposes it to fresh air each time.

James, just as a suggestion, when you review so many products, it may be worthwhile to showcase their names in the video while you're summarizing the key take aways! One has to rewind to say, which was which. Or maybe keep them in the same frame as at say 5:50? Thanks as always for answering every darn question i could ultimately imagine! You rock! 🙊

As a newbie to the finer coffee world, I’d like to have seen a Control Batch... just the original coffee bag opened and closed and extra air manually squeezed out... seen just how much doing anything with any of these options actually accomplishes... haven said that, I’ve been looking at the fellows option myself... glad to know I was on the right track... thanks for the review!!!

*stares at my bag of supermarket beans sealed with a clothes peg*

I don’t think I’ve ever watched a more detailed and in-depth review of anything! The time and effort you must have put into this, along with your professionalism and expertise are all very impressive and much appreciated.

My wife doesn’t understand me anymore after she saw me watching this video

I just love how James is like an overexcited dad with his child after school at the end of every video :D. Did you enjoy your day? Were the children nice to you? Did you have P.E.? Are you hungry? How were your classes? Was your lunch money enough? Did Karen call the manager?

When I started using my new Airscape canisters, I was surprised at how much longer my coffee retained good flavor. I especially noted how roasts I was familiar with had an extended “break-in” period-over 6 days-before they started peaking in flavor and no longer tasted grassy. Also, I highly recommend buying 2 small canisters instead of one large canister. I keep approx. 1/2 lb. in both, and avoid opening the second one until the first one is empty.

James, great content as always! I actually bought the Fellow Atmos Canister after a bit of research, your review definitely influenced my decision. I need to inform you that there seems to be an issue with the lid. The pumping mechanism is failing on my Atmos, it stopped functioning after only two weeks of use. I've contacted the company and they replied that they recently identified an issue with the sealing component of the Atmos lids. In light of this discovery, they have stopped shipping the Atmos canisters until they can guarantee quality. The good thing is that the Fellow company is aware of the issue and is transparent about it. They are also keen to send a new lid, once they fix the issue, but there is no ETA for that. Finally, they allow you to request a full refund.

So sad that James didn't include the original 12oz coffee bags (both zip and gold) in this test.

i wonder how i'll completely ignore the teachings of this video and keep making boring cheap mediocre at best coffee this time

Watching anxiously after having just purchased the Fellow Atmos.

One thing I'll note with the vacuum coffee saver, it's part of the Vacu-Vin line of product and I have a set of the "corks". The pump does actually have a way to let you know if you've pumped enough as it will start to produce a metallic click when you try to draw more vacuum after it's done as much as it can Also, to release the vacuum, just nudge the nubbin at the centre of the cork

Thank you for this... I ended up getting myself a CoffeeVac, even though I hadn't even been thinking about my coffee storage. Why? Because you made me think about coffee storage. Because, as a household of one, the coffee consumption here is at such a slow rate that my coffee is going to be sitting around getting stale simply because I can't drink it all before it does, so getting better coffee storage makes sense, if I don't have to spend an arm and a leg on it. And the CoffeeVac looked like very good value for money in that regard. So thank you.

Although I learn a lot from you, I am not nearly so fussy about coffee as you are. Finally, a test that has a direct impact on my coffee life! The reason vacuum-sealing did not result in significant outgassing is because after the initial purge of air those beans were never exposed to air again until shortly before use. Had you opened the container daily and re-established vacuum (as I would use such a container rather than inexpensive vacuum bags) you might have produced a different result. Always interesting, informative, entertaining -- I enjoy your channel and I wish we lived at least in the same hemisphere so we could be friends IRL.

missing a control. Should have coffee exposed to the elements, in a beans original bag. Would have been nice to hear the difference to the containers

Hey James, I know this is an old video but wanted to give you another experiment you could do with these. In the food packaging industry, part of the calculation for shelf life of dry goods includes weighing the food at certain intervals to see how much moisture it has taken up. If you were to design an experiment around weighing the beans before and after 6 weeks in each container, you should be able to see which system has the most integrity by seeing which one gained the least weight.

After years of using the Coffeevac, I can tell you: I have observed cracks in the bottom of the containers, eventually making them unusable. Remember, they're made of plastic, so they will have an "exipry date". I have recently moved to the Airscape, for three reasons. 1. they will never have cracks, since they're stainless steel. 2. you can buy REPLACEMENT lids, both for the inner and the outer lid! 3. there's less air sealed in than with the Coffeevac.

When Hoffmann says "it's the most expensive" I expect several hundred pounds at a mininum. Was pleasantly surprised!

"The backwards and forwards was not quite as nice" - James Hoffmann

When I open a new bag of coffee, I divide the coffees and put them into 4 oz mason jars, which are then placed inside a cabinet. That way, I minimize air contact and "agitation" without breaking the bank. The jars are also easily stackable/rearrangeable for tight spaces.

As is usual with James, the beyond thorough systematic review and deconstruction is maddening - I love it!

Two things James: 1) How would the coffee kept in the packaging do? 2) I would never keep coffee for that long! Ha!

I own a Coffe Vac. The valve that you mentioned is also an oneway check valve allowing the CO2 to escape. That might be why you liked that one better than the others in that category.

As I watched this I realized that it wouldn’t change a darn thing about how I store coffee. I just like to hear James talk. :)

The depth at which you tested these was impressive. Appreciate all the details and time you put into this one (as always).

I've had my Coffeevac for about two years and bought the Airscape for my parents as a gift quite recently. Good to know they seem like the ones for the job!

*me, storing my coffee beans in an airtight tupperware* James: the fellow is probably the best me: yeah, damn exactly, thought so too

I have 2 large and 2 small Airscapes. 1 bronze, 2 black with logos and one retro red with logo. Have 3 coffees in each one and homemade granola in another. Love when coffeehouses have their logo on them. And will always buy more when I see one! ☕🙋‍♂️📖 And by the way I cut the bag label off with roast date and day opened date and tape it to the lid. Just works for me. Thanks for your videos James.

Hi James! This is a small note but the date dial on the Friis container isn't actually for the coffee (but it could be!), its for keeping track of when you last put a new C02 filter in the lid, which in theory should be replaced each month, hence the 31 days

the return of james “i have reasonably large hands” hoffman

James, I really appreciated this test! I have a Fellow Atmos and I enjoy it. It isn’t a night and day difference, but it does seem to extend the “golden period” of the coffee by another week. Secondly, you absolutely can take the metal disc out of the top! You simply remove the rubber gasket and remove the metal piece and cloth thingy below it. I wouldn’t clean the cloth, but I have washed the metal disc.

Extremely informative video! I'm glad someone went through the time and effort to evaluate these storage technologies. Since the difference in results are relatively small, the more significant factors in storing are IMO: 1) opacity so light doesn't accelerate the reaction to any remaining air, 2) fewer parts probably means more durability, 3) pick one that's easier to use (large hands and small openings are a pain). Thank you so much for this video!

The level of care and thought put into this video was nothing short of outstanding. Well organized, clearly focused on the data, and it was very clear no company was pushing their product as superior. Really interesting and awesome video.

Thank you for covering this. Im so happy i can barely contain myself.

As a comparison I ran an experiment a while ago with vacuum seal bags. Right after roasting I sealed 1oz of coffee in each of two small bags. One bag I left at room temperature. The second bag was immediately placed in the deep freezer. Results: The bag at room temperature was puffed out after just one day from off gassing and was ready to pop after a few days. The second bag in the freezer maintained a perfect vacuum for weeks. I then took it out of the freezer and it did exactly what the first bag did. Puffed up after one day and ready to pop after a few days. So the freezer totally prevented off gassing. So it seems that by putting freshly roasted coffee in vacuum bags and freezing you can have almost indefinite perfect storage with identical taste to the freshly roasted that wasn't frozen. Note: I only do pour overs so I don't know what effect it would have on crema or other things in espresso.

One thing James didn’t take into account is the amount of coffee being stored. I have the airscape and, what I like about it is the fact that the volume inside the container is essentially variable. It works just as well with a small amount of coffee as with the larger amount of coffee because you can push the lid down until it contacts the coffee.

I'm continuously surprised and impressed at the depth and thoughtfulness in your videos. You truly take the time to think through all the variables and explain your whole through process and give practical advice. I'm also very fond of the way you talk about price ranges. You seem to have a great grasp on the fact that most of us are dealing with a few hundred dollars to spare, not thousands, and do not belittle the options we can get in that price range. My favorite KZfaqr by far, even though I just started watching you. You really are a master of your craft and I'm very impressed by the content you produce, and what's more, the coffee I can now produce because of aforementioned content :) Thank you!

I've had an Airscape canister for almost two years now. I've been very happy with it. I've started ordering 2lbs at a time from a nearby roaster. I vac seal 1lb in the freezer, and keep the other 1lb in my Airscape. I haven't noticed any big changes between the last cup from the canister, and the first cup from the thawed freezer bag.

The dot popping up on the Atmos has quietly annoyed me to no end, it now makes sense, thank you!

I’ve tried several canisters, but was never convinced they worked to extend freshness or flavor. I eventually just started using rubber straps to seal the coffee in the original foil-lined bags I purchased them in. When I pull out the beans for the day, I fold the bag over to remove as much air as possible, and then place a large rubber strap around the bag to keep it flat/sealed.

Love these videos, James' vast knowledge, keen scientific approach and impeccable delivery is always a pleasure to watch. And just as a shout-out to the channel & team as a whole, the whole production - such as the camerawork, lighting, editing and graphics - is simply 10/10. Keep up the great work!

Can we just appreciate the absurd lengths James goes to for us?

I appreciate the comment at the end about keeping the coffee in a resealable bag. My method is to leave the coffee in whatever bag it comes in, squeeze out as much air as possible, put that bag in a freezer gallon bag and again squeeze out as much air as possible. I’m convinced that oxidation is more a function of free air exchange and less about total air-tightness

I have a Food Saver Vacuum sealer that I've had for a long time. I have used it to vacuum seal my coffee for a long time, and at this point, I'll talk about the lost sealed container. I vacuum sealed some of my coffee, and it was packed when we moved. Four years later I found it in the basement with my canning products. The date was a little over 5 years. I groaned as it was one of my favorite coffees from the City I had moved from. I pressed the vacuum release button and it was, to my surprise, still sealed and you could hear the air rush in. The aroma that wafted out of the container way a pure delight. I brewed this coffee in my favorite method, and it tasted like the day the coffee was bought. Very surprised, and delighted. I now vacuum seal everything.

I'm at the very beginning of my coffee journey and yet I'm watching this middle of the day. Hoffman is an addiction.

Although it’s the only solution I’ve used, the airscape does do a fairly good job of increasing the “enjoyable” shelf life of coffee.

Hey James, great review! Next time around for a test like this, would you mind adding a control? I feel like it would have been a nice addition if you had tasted a regular bag of coffee beans that you had opened at the beginning of the 6 weeks. Keep up the good work, I love your videos!

I’ve been thinking about getting the atmos, but I saw some reviews about it losing a vacuum after a few days. Thanks for the explanation about that being caused by the gasses releasing from the beans! I hadn’t thought about that, it makes a lot of sense!

As I already have a vacuum sealing machine in my kitchen (for vacuum packing products for freezing, or occasionally sous vide cooking) I’d bought a quality, but cheap set of vacuum storage jars made by Lacor, which come with in 3 sizes the largest of which can easily store 1Kg of beans, and the smallest easily a 250g bag of beans. Best part of all is all 3 only cost just over £20, though of course you need some means of getting the air out. Brilliant given the whole set was cheaper than just one AirScape container, and they really hold their seal and are super easy to operate, are made of tough, strong plastic and there are no issues with putting them in your freezer (if you have room). I guess these are way, way cheaper are they are general purpose and not marketed specifically as a ‘Coffee’ product, as lets face it most companies use that as a licence to charge extra. Interestingly, the vacuum pressure is so good that I’ve never found any noticeable drop in seal pressure from off-gassing, though I do tend to use lighter roasts. You can get them on Amazon and would highly recommend them, provided you’ve got some means of extracting the air (they even come with a spare tube to connect up a vacuum pump/sealer that’s a standard size). Even the big one takes less than 10 seconds to extract all the air when only a few beans in it, and much less the fuller it is. Hope this is helpful to others 👍

I love how I'm gonna watch this video and then continue to keep coffee in the little tin it comes in

Another alternative to consider is using gas displacement. I've tried using many of the canisters you've reviewed here, and while I had best results with vacuum canisters, they're just too fiddly to use in the morning. My alternative is to use an opaque one liter airtight canister, that I fill half way with coffee, roughly ~220 grams, which is enough for 5-10 days of espressos for me. I then fill the container with an ounce of carbon dioxide from a small tank, the sort sold to use with home soda machines, which holds ~14 ounces of gas. This is more than enough to repeatedly fill the one liter volume of the air tight canister. It's not a precision operation; since CO2 is heavier than air, as long as there's enough gas to cover the coffee, a gas barrier forms and oxidization is significantly reduced, and one ounce of CO2 is enough to displace a liter of air several times over. A little air will get mixed in every time the lid is opened or coffee is scooped out from the top, but it's not significant when coffee only lives in the container for around a week. When I run out of coffee, I transfer a week's worth from the freezer, and shoot another ounce of gas into the canister. I've also tried using argon gas displacement, which works as well as CO2, but there wasn't any discernible difference in taste, and recharging a small CO2 tank costs significantly less than having a tank charged with argon.

I’ve been using the airscape for a few years now, and I’m extremely happy with it. It pulls the air out nicely and keep the beans super fresh for the two weeks it takes to deplete my bag’s worth. It’s very easy to clean as well!

Waiting for James to reveal that he carries the beans in his "fairly large hands" until they're ready for use. Fourth-wave coffee type stuff.

This was well thought out bar the missing control. If there is no discernible difference between storage in a bag or in a container then these products are less important.

I’ve had the coffeevac for years and I’m pretty content with it. It very well could be a placebo effect but it’s nice knowing my coffee is safe from light and is reasonably well sealed.

I so appreciate the hard work that has gone into making this video! Great info ❤️

Warning regarding the Fellow Athmos: Owned one for a bit over a year now and I'm about to return it. The issue with it not being able to hold a seal for more than a few days is definitely not only due to CO2 release. Even if cleaned regularly and used without any coffee inside it won't hold a seal for more than 3-4 days. That's pretty bad if you ask me because keeping a seal basically is the only reason I am spending that much on a coffee jar. Mine also had the issue of the vacuum indicator not reseting so it would show green even if the lid is off the canister. Customer support only responds with an instruction on how to clean the lid in case it can't hold a vacuum and a link where I could buy a new lid. I think I'll switch to a beer bottle + wine vacuum stopper.

Seeing something you own in these: "You can do it, I know you can. (please validate your existence on my shelf)"

I went from a simple plastic container container for my beans, in the fridge, than after a few years changed my storage space for the freezer. Went for zip bags back in the fridge. Then I bought myself a mid level espresso machine and started visualizing all these different videos. OMG !!! This seemed to be so complicated. slowly but surely it became much easier and I started tasting the difference. So I am now with a simple black sealed steel container, wanting to go a step further, so this video really helped me out. Thx. Keep up with the good work.

I have a Starbucks branded Airscapes I bought as my first coffee storage method and haven’t looked back since. I love the feel of the metal casing and hearing that suction as I pull up the “plunger” valve is quite satisfying.

What I'm interested in is: How do you store your coffee James?

I’ve got 3 masters degree transport design finals this July and here I am watching a video about canisters

It might have been interesting to test a bag with a built-in valve. Based on your test criterion and results, it suggests a well-made bag might just be the optimum storage for beans.

I just got the Airscape (copper finish) because of the wide opening, simple construction, and I have large hands. It’s also nice that you can store the scoop in the upper section, above the seal plunger and beans yet still in the container.

Thanks for the incredible amount of time and effort that you must have gone through to get all this data. I immediately went online and ordered the Airscape.

I use the Fellow and it’s been great. If you use the coffee daily it never looses pressure in my experience. I stick with one bag of coffee until used and I get a better cup at the end of the bag with the Fellow vs when I used just an airtight container.

From the Ankomn product page you linked: "In every lid you can find a silicon indicator, this sinks down when there is a vacuum present, so you always know at a glance. "

I’ve had the fellow for a few years, potentially got it after this video was uploaded. I’m back to say it still holds up fantastically, and I keep it in a lens sleeve to avoid light and allow me to travel with less worry of any breakage. It seems to hold up better than the bags the coffee initially comes in. I had gotten two bags of the same coffee. I put one in the Fellow and the other I kept in the storage bag. The Fellow container seemed to hold the coffee’s “freshness” for quite a bit longer than the shipped out storage bag. Just thought I’d mention it!

Why yes James. I will give you my thoughts. Thanks for asking :-). I use a air displacement container (food saver) when I am storing beans that I don’t want to mess with for a few weeks. Like when I find epic beans, but my espresso grinder still has a weeks worth of other beans left in the hopper. But, I use an air scape for decaf, because it’s easier to get in & out of for daily evenings decaf pour overs.

I'd argue a resealable coffee bag is actually closer to the displacement method because you can press out the atmosphere before sealing. It would be interesting to see how the same coffee in a resealable bag faired here. Curious also for the use cases. Many viewers of yours are not likely to keep 12oz of coffee around for 6 weeks. 3 weeks with 1 week in original packaging may have approximated closer.

"You gotta do the awkward pumping thing.... You don't really know when you're done."

I use a decently wide and simple container of the "just airtight" type, and I keep the coffee in the bag that I get it in, inside the container. I cut the top off the bag and then keep it closed using a plastic clip. That allows for minimizing the volume of air above the coffee, just like for the "second" category of container, but in a simple and cheap container. Double-sealed system (together with the container lid) and non-transparent because of the bag, for cheaper than a complicated solution. I use very dark roasts, and I do notice a definite difference in smell when I open a new bag of beans compared to one that has been open for a while, but I haven't made any back-to-back tests like this. There have been other things that have impacted the coffee flavor more for me, and I'm glad to say that this channel has given me a lot of ideas and opened my mind to how to start going about making my coffee taste better!

I don't know why this didn't occur to me sooner, but this made me realize my vacuum sealer has a hose attachment for use with containers. Looks like I finally have a use for it! As you said in your video on freezing it seemed wasteful to use bags for coffee, but this seems like the perfect solution and should make a better vacuum than any of these containers. Thanks Mr. Hoffmann! P.S. As someone who works in a research lab, there's no such thing as a 'perfect' vacuum, even in space ;)

Just watching this to justify my Fellow addiction. Love how aesthetic, simple and minimalist all their products are! Are you by any chance planning on reviewing the Ode Brew Grinder as well?

The pump tells you when it has reached a vacuum by making a clicky sound. (maybe not the exact one you had in that set, but definitely the one I have for wine called vacuvin)

Well. this is an eye opener. I use 1L grass containers with silicone seal. They are always stored in a dark cupboard. I roast my own stored with breathable membrane for first five days and then remove the membrane when coffee starts being used. I roasted full glass containers of 5 bean blend which were sent to relatives. Containers were wrapped in cellophane and placed in a box , Box bottom had urethane foam, trash bag divider, container, trash bag divider and more foam to fill. When boxes arrived they unpacked well, but containers showed evidence of film that was not coffee. That showed containers did not seal well as I thought. Never do that again. I will try the vacuum method for myself and standard coffee bags for shipping. Thank you, James.

The little vacuum pump from the Vacuum coffee saver or any similar pump will also work with the standard valved ziplock sealable coffee bags the beans come in. You can easily remove most of the air prior to sealing, then pump out the remainder through the one way valve. The bag also pulls tight against the beans letting you know you still have vacuum.

Something that might be worth considering: how much water/humidity is lost from the beans stored in air-tight container vs vacuum-sealed. Although the beans are all supposed to be equal in weight for each test in the espresso section, perhaps the density of the beans are different due to how they are stored--and hence they behave different when ground wrt channelling?

James, I would like to see you do a test to see if the vacuum storage does harm during the first few days by prematurely removing the CO2 and allowing oxygen to contact more surface area after grinding. Since fresh roasted coffee outgasses CO2, it would seem that repeatedly vacuuming out the CO2 would encourage oxidation of grinds. You would need to repeatedly open and seal the container, say, two or three times a day for two days. Then on the third day, let the just-ground coffee sit for one, two, and five minutes (three different trials). The control would be the same batch of coffee kept in its bag or an Airscape container that is unopened for two days. We want to see if there is some point at which enough CO2 remains in the control so as to produce good flavor after outgassing, compared to the vacuum treated coffee that has had more of its CO2 removed so that the grinds quickly stale after 1, 2, or 5 minutes.

3:36 i just wanna say that i DEEPLY respect the amount of work you go to for these things. even just brewing 10 cups of coffee feels near overwhelming. not to mention sourcing all the containers, getting the beans ready, storing them for an extended time, and the methodical way you go about everything. i live for your comparisons! so good! so helpful! such science! lol. that's why you dipping into food AT ALL was so fascinating (like with the tiramisu). i've only seen one other guy on YT have this method. Ethan Chlebowski (first one i saw was canned tomatoes and if san marzanos are really worth it. but he had another testing diff types of flour for pizza dough, which is best, or what the actual diff in results was, so you could decide your own preference.) anyway, just want to say, thank you for your service! i'm hoping you do an updated espresso machine line up vid, since you just did the grinders again recently. the $100 and $500 groups. i'm sure a lot is different now that it's been 3yrs. (just looked up the date stamps on those).

my partner has an airspace and she got me one recently. I love it. Very convenient and you trust it's keeping the air out. Great video as always

I just re-use an old Illy metal canister. Saves $ and does a pretty good job.

I use a Ball, amber glass “mason jar”. It’s perfect, easy to use, and if you have a vacuum sealer, there is a jar sealing attachment that would work if you expect to use the coffee over a little get period, cost for the jar, $6.

I light roast myself for Aeropress and I travel, I've used two Fellow canisters for about a year and they're fine. But I'm often having to twist to remove the gas while they rest. I'm going to start roasting for espresso and due to the longer rest time for degassing was going to buy a few more Fellow canisters. Can't find them, out of stock. After re-watching your video, and realizing there's not much difference between expensive canisters and re-sealable bags, I've decided to go with Zip-Loc style plastic storage bags, stored in a drawer. They're airtight and there's no light in my kitchen drawer. Re-usable and a whole lot cheaper. Thank you for all your honest tests!

I have been using a fellow Atmos for over a year now and thought mine was broken. Constantly the green ring disappeared and I never knew why, thank you for providing answers! 🙌

I learned this lesson from storing pipe tobacco: mason jars in a cool, dark place. The simplest solutions are usually the best.

I love James' reviews. I've waited for years for this video! I'm also a big fan of Aeroscape canisters. I purchase one every time I travel to the US. I started playing this video, and I got struck with disappointment when he said that the Airscape arrived late and couldn't be tested like the rest. I feel very frustrated, since getting the best possible coffee storage canister isn't something one REALLY needs, and by definition, one cannot have enough of what one doesn't really need. I've researched for weeks before choosing a canister, and now I'll never know if it's the best or not, because James won't run full blown tests that take 6+ weeks to prepare just because one option arrived too late. I'd walk the streets looking down, sulking, with my hands in my pockets, kicking cans in the way, but I can't go out because of the mandatory lock-down in Buenos Aires.

I absolutely love your videos Mr. Hoffmann! I have been taking my careful steps into the wonderful world of coffee, and have been enjoying your videos thus far! I started off with the standard pre-ground coffee from Tim Hortons, brewed in the K-Cup Keurig machine I have from my college days. Now I have a little electric coffee grinder and a De'Longhi Dedica I got off kijiji a while back and have been having a lot of fun learning how to properly make espresso, and it is absolutely delicious! Haven't splurged yet and gotten any specialty beans or upgrade my espresso machine as of yet, but I'm excited to continue moving into the wonderful world of coffee. Thank you for sharing your knowledge on coffee science! It is very much enjoyable to see!

Got mine a few months ago for storing a green plant legal in my state. After getting ridiculously good results with it keeping that product fresh and tasting great, I got one for coffee (but the medium size) and really like how it keeps coffee fresh. I used mason jars for both of those products before and the Atmos has definitely shown a difference in quality over time stored.

Put that Mason Jar you have lying around in your house to use and buy a vacuum fermentation lid. It will let you know when you have a complete vacuum and it’ll also allow built up CO2 to escape.

12:20 “you dont really know when you’re done”. I don’t that container, but based on the tool and the valve, it’s the exact same mechanism used for wine. If you keep pumping, eventually you should start to hear a “clicking” sound which tells you when you’re done

I bought the glass version of the Atmos container and after watching this now feel a little silly. Since my pallet isn't super refined to notice any drastic differences I still love it! Thanks for putting in the time to do this!

I had an issue with my Fellow Atmos and below is their response. Mine wouldn't hold vacuum for a day but I was surprised to hear from them that they aren't designed to hold a vacuum for more than two days. I can't find anywhere that they advertise this: "Atmos is optimized for regular to semi-regular use (daily or every couple days). It is intended to keep your current coffee fresh while you're using it through out the week, so the lid seal is designed to be open and closed easily, and spec'd to hold the vacuum for a minimum of 2 days. Air molecules are tiny, and we've found that eventually air will find its way through even the best seals, hence why you need to regularly inflate your bike or car tires. For this reason, we don't recommend Atmos for long term vacuum storage (more than a week)."