A plastic airtight container is a durable, food-safe storage solution designed to keep contents fresh by sealing out air and moisture. It typically features a secure snap-on or twist-lock lid with a silicone gasket, ensuring a tight seal. These containers are ideal for storing dry goods, leftovers, and perishable items, preserving their flavor and extending their shelf life. Their clear design allows for easy identification of contents, making them convenient for kitchen organization.