canister

A canister is a small, typically cylindrical or rectangular container used to store and transport goods. Canisters are made from metal, plastic, glass, or composites and are designed to be durable and often airtight. They are used in homes, industry, and military contexts to package dry goods, chemicals, or equipment.

In consumer packaging, kitchen canisters are common for storing flour, sugar, coffee, tea, cereal, and other dry foods. They come in various sizes and seal types, and are often sold as sets for pantry organization. Airtight lids or seals help preserve freshness and protect contents from moisture and pests.

In historical and military contexts, canister refers to a type of ammunition called canister shot. A canister is a metal container filled with small projectiles (such as lead balls) that, when fired from a cannon or mortar, disperses them like a shotgun blast to maximize area effect against infantry.

In household appliances, the term canister is used for canister vacuum cleaners. These devices place the motor and dust collection bundle in a separate canister connected to a wand via a hose, offering mobility and strong suction across different floor types. This design contrasts with upright vacuums and is favored for reach and versatility in larger spaces.

In storage and shipping, canisters protect contents during handling and transport. Material choices influence durability, recyclability, and environmental impact; metal and hard plastics are commonly recyclable where facilities exist.