What is a cooler?

A cooler is a device or container designed to keep liquids or foods at a lower temperature than the surrounding environment. It is typically an insulated container filled with a cooling agent, such as ice or a refrigerant, to maintain a cool temperature. Coolers are commonly used for outdoor activities, such as camping, picnics, or sporting events, to keep drinks and food cold and fresh. They come in various sizes, from small, portable units to large, wheeled coolers for extended trips or events.