The ice box cooler box section of O Meara Camping's website will show you a High End Range of Cooler Boxes which can keep Ice for 5 or 10 Days. Ice boxes and cooler boxes do not require power to work. Ice boxes and cooler boxes are very thickly insulated to keep the cold in and the heat outside. More expensive ice bokes cooler boxes have advanced forms of insulation and use very high grade plastics in their construction. Ice boxes and cooler boxes are Ideal for commercial use, long holiday periods, farmers markets, fishing or parties.