A "cooler" is a portable container designed to keep food and beverages cold. It typically uses insulation and ice or ice packs to maintain a low temperature, making it ideal for picnics, camping, and outdoor events. Coolers come in various sizes and materials, including hard plastic and soft-sided fabric. Many coolers also feature additional elements like built-in handles, wheels, and drainage systems for easy transport and cleaning. Some advanced models even include features like solar panels or battery-powered cooling systems, enhancing their functionality for longer trips. Popular brands include YETI, Igloo, and Coleman.