It could be a way to store food to slow spoilage but, It wouldn't quite be the same as the storage crates in game right now. They shouldn't be able to control moisture the same way a refrigerator or properly built root cellar does from a realism perspective because the mechanisms in place for insulation just aren't there with these. Perhaps a happiness+ boring hit to the food that's been in there for more than a couple days (not necessarily a hunger hit since freeze-thaw cycling would almost assuredly happen)