That is not real vacuum BC if you truly suck out all the air the weight of the atmosphere will collapse on to the glass and the glass will break. Hence why when you sucked the air out of the bottle it will just deflates. Also if you truly was able to create a vacuum without the glass breaking the marshmallows should fill up the whole glass jar. That is why they use plastic bag or flexible material to create vacuum that will collapse on to the food itself. Please try this experiment again with a impermeable bag to make sure it is a true vacuum and isolated.