Small item for a bigger purpose. Food should rot. A big cupboard full of meat shouldn't be as practical as it is now. That is, unless you have salt.
Salt would delay rotting and give more hunger with one appliance, at the price of 1 FEP. With a second appliance, another FEP is taken, but food doesn't rot, and it fills you to full hunger. Salt is mined near or in water with a pickaxe, or you can carry the whole rock if it is small enough. Salt comes off in chunks, which take up 1 slot. If you have a container in your inventory, you can grind the salt rocks on a quern. Then the salt is usable.
Barrels should also have another use, packing meat. You can fit a backpack full of meat in a barrel, which you then seal, and rotting stops until it is opened. The barrel is filled with a % meter. Salted meats take up less room, to encourage salting and storing. Thoughts and expansions on this? It's totally imbalanced, but hey.