Whippit

[Britney]

A small canister (usually 8 or 16g) of nitrous oxide gas (N2O). Used officially in making whipped cream, but more often used recreationally to for its dissociative effects. If used properly and in moderation whippits are harmless. However, improper inhalation (e.g. wearing a mask or putting a bag over ones head) can lead to oxygen deprivation, and heavy use can lead to vitamin B12 deficiency. Youd have to be a complete moron to put a bag over your head in any situation, and the B12 deficiency is easily treated, so nitrous is a pretty safe drug.

[Tina]

releasing NO2 from a cannister into a balloon and inhaling it. The effect is temporary, lasting only about one minute, and is harmless. (NO2 is used by dentists regularly during painful operations)

[Mark Zuckerberg]

Nitrous oxide dispenser, used legitimately in making whipped cream.