Milk Crates would work great! They can hold things, but also have holes to help circulate the air. We have also used just plastic tubs to sort stuff. Like we have a red tub for beef, a blue for poultry and a green for misc., meats. The we have one that has frozen veggies and one with frozen fruit, everything else, like pizza and snacks usually just get stacked together. I usually end up having to reorganize every few months because I forget about what all I have, so I stop shopping as much and try to eat off our stockpile about once a month to keep stuff from expiring, etc. Hope this helps.