It would make a lot of sense if food came in different sizes too. A typical ration is meant for a (medium) human, and would be just a snack for a troll, or a ridiculous amount of food for a pixie. So there should be small, large, etc. rations. And pieces of meat, bread, etc.

With sufficient skill in cooking or food preservation you could split food up in smaller protions, or add small portions together.

This would also help balance Trolls/small races in the early game.