They are not vacuum sealed. I kept my Christmas soft cookies yesterday and they turned pretty hard. They can be used as a decoration in your kitchen. Love the color and look. But, if anyone wants to buys them to use as a canister then it is a waste of money. If you want to use them as a decor item then yes, this is absolutely an eye catcher.
I loved the way these canisters looked when I saw them online on Overstock I had no idea when they were delivered and I unpacked them how beautiful they were and how much they complimented my brand new kitchen remodel ...I am redoing my new kitchen and they look just as beautiful with my new countertop... no you cannot store anything like flour or sugar in them however you can store K-Cups sugar packets ,tea bags so it works quite well for other uses Luv Luv Luv