Whip-It Brand Cream whipper and charger systems are invented by Whip-It's original manufacturing partner in Switzerland in 1950's. Each charger is cleaned numerous times with a solvent Each charger is filled with 8 grams of highest quality medical grade N2O and made out of 100% recyclable steel Food grade N2O is used as a propellant for whipping cream, which dissolves in the liquid cream This item is not for sale in Catalina Island