Airtight containers are specially designed to prevent air from entering or escaping, which helps preserve the freshness of food and other items. They are commonly made from materials like glass, plastic, or metal and often feature a sealing mechanism, such as a rubber gasket or locking lid. These containers are widely used for storing dry goods, leftovers, and even liquids. Using airtight containers can help reduce spoilage and extend the shelf life of products by minimizing exposure to moisture, air, and contaminants. They are popular in kitchens, for organizing pantry items, and for meal prep. Airtight containers are also useful for storing items like medications and craft supplies.