I love that sling! I have it and use it almost every day as my EDC. However, for my recent trip to WDW, I wanted to carry more stuff like a water bottle, rain jacket, snacks, and I certainly needed the extra space for the multiple souvenirs I inevitably bought. All that wouldn't have fit inside my Days Sling 3 as much as I love it. So I opted for a Bellroy Lite Daypack and it was heavenly! Super light, comfortable, and could store everything I wanted to carry

Well, what I do is I bring my messenger bag with a hero clip (the one you have there, just medium size) attached and I clip my water bottle since it has a little hook. This way I have all my stuff and water without bringing a backpack. You can also try a foldable water bottle, once it's empty you just shrink it and you barely notice it's there.

Those Disney coasters in the back are pretty cute!

As someone newly converted to using a sling bag for airplane travel, I've been pondering whether to use it in WDW or stick with a backpack. Thanks for your video, this was really helpful!

It can absolutely fit a bog standard 20cm plastic bottle, the width of the bag is 29cm or 11.5", it really depends on the bottle dimensions, someone fit a fordable umbrella + stainless steel bottle in the xpax version and it sill has some top space so it closes easily.

Nice video. Thank for share.

Random question...does that Gear Aid clip set off the Disney World security alarm if left hanging outside the bag like that?

Keooz? You mean lines?