Cook with confidence on your next camping trip with Coleman® Butane/Propane Mix Liquid Fuel. The fuel comes in a compact metal cartridge that has a capacity of 250 grams and weighs only 13.4 oz. when full. The cartridge is self-sealing for safety and easily attaches and detaches from stove couplings to prevent fuel loss. The fuel is a mixture of 70% butane and 30% propane.