Emergency rations. Food bars
These are briquettes from high-calorific food the containing 400, 1200, 2400 or 3600 calories. They are used, when there is no an opportunity to receive enough calories from usual food (N-r when it ended or not an opportunity to prepare). Fudbar is densely pressed briquette which is placed in tight packing. Fudbara N-r, high/low temperature are not sensitive to a corrosive environment of storage, (+60/-35). Also positive side is what fudbar does not need to be prepared! Just opened and ate!