Our first test of this cooler was last August. It sat in our driveway for with no shade for 3 full days. Ice was a little over half way melted in the hot Utah sun! I would call that a success for the price of this cooler! We will be putting it through longer stretches this summer while camping but so far we are satisfied and now I feel like I have a high end cooler (for keeping up with the Jones's) for only a fraction of the cost.