Canister

From Latin canistrum.

Full definition of canister

(plural canisters)

A cylindrical or rectangular container usually of lightweight metal, plastic, or laminated pasteboard used for holding a dry product (as tea, crackers, flour, matches).

1963, Margery Allingham, The China Governess Chapter Foreword, Everything a living animal could do to destroy and to desecrate bed and walls had been done. … A canister of flour from the kitchen had been thrown at the looking-glass and lay like trampled snow over the remains of a decent blue suit with the lining ripped out which lay on top of the ruin of a plastic wardrobe.

Any of various cylindrical metal receptacles usually with a removable close-fitting top.
A special short range antipersonnel projectile consisting of a casing of light metal, loaded with preformed submissiles such as flechettes or steel balls. The casing is designed to open just beyond the muzzle of the weapon, dispersing the submissiles.
A component of canister type protective mask containing a mechanical filter and chemical filling to filter, neutralize and/or absorb toxic chemical, biological and radiological agents.
A projectile component containing colored or screening smoke or riot control agent composition.