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A whipped cream charger (colloquially called a whippet, nos or nang when used recreationally[1]) is a steel cylinder or cartridge filled with nitrous oxide (N2O) that is used as a whipping agent in whipped cream. The narrow end of a charger has a foil covering that is broken to release the gas. This is usually done by a sharp pin inside the whipping siphon.
Nitrous oxide is a popular recreational drug, and whipped cream chargers are a convenient source of the gas.