Fuel Mixes: Primus Power Gas (25% isobutane, 50% butane, 25% propane), Primus Propane (100% propane), Coleman Outlander (70% butane, 30% propane), Coleman Propane (100% propane), Optimus Energy (25% isobutane, 50% butane, 25% propane), Burton Max Butane (100% butane), Burton Max Fuel Blend (80% butane, 20% propane), Olicamp Rocket Fuel (75% isobutane, 25% propane) Butane Stove Fuel 8 oz: Includes a collar notch on top of the canister that provides easy alignment in appliances. Powerfuel contains 1 liter of naphtha (chemically clean gasoline / petrol) with added corrosion protection. For maximum efficiency and minimum consumption, use our high-performance propane / isobutane four-season blend. Propane provides higher vapor pressure for better performance in cold weather. Isobutane provides more constant pressure as the fuel level gets low. The 100gram fuel canister will pack inside of any model Personal Cooking System. 230gram and 450gram canisters will pack inside of the Sumo Companion cups and the Sumo systems. Empty fuel cans are recyclable with our CrunchIt Tool. Check local facilities for recycling info.