A canister is a container typically used for storing food, spices, or other small items. They are often made from materials like metal, glass, or plastic and come in various shapes and sizes. Canisters help keep contents fresh and organized, making them a popular choice in kitchens and pantries. In addition to food storage, canisters can also be used for non-food items, such as craft supplies or small tools. Some canisters are designed with airtight seals to prevent moisture and air from entering, which is especially important for preserving items like coffee or tea.