As soon as I got this cooler i went on a 4 day camping trip to test it out. Packed it full of an assortment of different stuff, crammed in 2 bags of crushed ice and off we went! All the drinks stayed nice and cold, the perishable foods stayed good the whole time, and by the time I got home on the 5th day, there was still ice in the cooler. The cooler was opened multiple times a day for food and drinks, and was out in the sun majority of the day.