The Gourmet Whip is a stainless-steel siphon: fill it with cream, thread in a food-grade N2O charger, and shake for whipped cream on demand, no aerosol propellants, no single-use can. The same canister aerates fruit purees, savory foams, and even carbonates cocktails, since anything thin enough to pass the nozzle works. Buy chargers in bulk and the canister itself lasts indefinitely.