Always have an extra source of fuel for your Jetboil cooking systems by picking up a Jetboil JetPower Fuel canister. The 100 g Fuel canister fits neatly inside any of the Personal Cookin Systems and can be easily recycled with the Cruhcit Tool. JetPower gives you rht maximum efffeciency and minimum consumption while still giving you the high-performance wuality that you'd expect out of a Jetboil product. Propane provides a higher vapor pressure which in return give you an overall better performance in colder weather and with the use of Isobutane, you have a fuel system that can keep a constant pressure for when the fuel starts to run low. If you own a Jetboil, do your self a favor and pick a JetPower up, you never know when you'll need it.