A portable cooler is a container designed to keep food and beverages cold while on the go. It is often insulated to maintain low temperatures and can be used for picnics, camping, or beach outings. Many models come with handles or wheels for easy transport, and they can vary in size from small lunch boxes to large coolers that hold multiple items. These coolers can be filled with ice or ice packs to enhance their cooling efficiency. Some portable coolers also feature additional functionalities, such as built-in cup holders or storage compartments for utensils. Popular brands include Igloo and Coleman, which offer a range of options for different needs.