Making use of sunlight for cooking, drying or pasteurizing food. There are three types of solar cookers used: box cookers, panel cookers and reflector cookers. Box cookers are basically insulated containers with transparent lids that allow sunlight to penetrate. Panel cookers use reflective panels to direct sunlight onto an insulated container. Reflector cookers use various reflecting mediums such as mirrors, troughs and dishes to focus light on a cooking vessel.