Available in 100 g (case of 24 cans), 230 g (case of 24 cans), and 450 g (case of 12 cans).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 100g fuel canister will pack inside of any model Personal Cooking System. 230g and 450g 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.