Ice boxes, also known as ice chests or coolers, are insulated containers used to keep food and beverages cold. They are typically filled with ice CUBES or other cooling agents, such as dry ice, to maintain a low temperature. Ice boxes are commonly used for outdoor activities, such as camping, picnics, and beach trips. The term 'ice boxes' can also refer to the old-fashioned refrigerators that were used before the invention of electric refrigerators.