Airtight storage containers seem to be a dime a dozen nowadays. At least, containers that claim to be airtight. But did you know that most "airtight" containers really don't do the job? Why? Because they might keep air out once you put the lid on, but all the air already inside the container stays locked in there-with your sugar of flour-until the next time you open it! You're actually locking in the air that destroys the freshness of your food!
I'll be honest; this is something I never even thought of until I learned about AirScape food storage kitchen canisters, the truly airtight storage canisters from Planetary Designs. I received the 64oz AirScape canister in Mocha for review. This is an amazing item! An AirScape canister comes with two lids. The inner lid is actually a valve that forces all the air out of the container. Simply pop the handle up, push the lid down to the level of the sugar or whatever you're storing inside, then push the handle down. With the clear lid on top, and you can easily check the content amount, but the dark inner lid/valve removes air, locks air out, and also blocks UV light from reaching the ingredients!
Another aspect of the AirScape food storage kitchen canisters I think is great is that the stainless steel is odor resistant. Have you ever stored coffee in a container only to get to the bottom and find you'll never be able to put anything BUT coffee in there again? Just happened to me yesterday! Not with AirScape though, not even coffee seeps into the pores of this kitchen canister!
Honestly, AirScape containers have to be the best I have ever seen for kitchen storage. I'm thinking of slowly weeding out all my plastic canisters and eventually using only AirScape for our kitchen storage!!