To use the easy and convenient Whip-It! Professional Whipped Cream makers, you need to buy the Whipped Cream Chargers to dispense your whipped cream. These chargers, which come in a ten pack, will dispense fluffy and fresh, velvety sweet whipped cream and it is a certified food-safe gas. This is a pure N20 under pressure and it should only be used to prepare food, such as this delicious homemade whipped cream. Since this is N20, it is recommended that you do not inhale the contents or let minors handle it. Also, keep it safe by not exposing it to the sun, heat, or stove. This Whip-It! Cream Charger is stored best in a cool and dry place, so you can use it optimally. Use one cartridge per pint of whipped cream!