A Foodcube is a food item, purchased from relevant traders or created in a Cooking Stove. They make good travelling rations, and can be very profitable to mass produce and sell. Foodcubes have the same nutritional value as Gohan, but are slightly more expensive.
Foodcubes are essentially a nutritious block made from a vegetable-grain mixture. It is similar in concept and appearance to the real-world nutraloaf.
Foodcubes are listed as an ingredient for Ration Packs, an item which is not craftable.