A whipped cream charger (sometimes colloquially called a whippit, whippet, nossy, nang or charger) is a steel cylinder or cartridge filled with nitrous oxide (NO) that is used as a whipping agent in a whipped cream dispenser. The narrow end of a charger has a foil covering which is broken to release the gas. This is usually done by a sharp pin inside the whipped cream dispenser. The nitrous oxide in chargers is also used as an oxidizer in hybrid model rocket engines.

Is it true that is nitrous oxide still used in whipped cream?
yes