Depending on use and weather conditions, this can be for several days at a time! They also come with a 5 year guarantee! Ultimately, every single detail of these boxes, made from impact resistant and seamless plastic, is designed for the toughest conditions. These trusty cooler boxes come with strong and thick refrigeration grade foam insulation with unique labyrinth seal design that holds the cold air inside and hot air out for longer. This ensures your ice lasts much longer, despite the harsh outside temperatures.