I&#x27;ve used my xxl large icemule cooler at the Dry Tortugas in April and again at the beach in the outer Banks NC. The Dry Tortugas put it to the test. The drinks and food kept cool for two days even after getting in and out of it frequently. Very handy to carry on the back. My son appreciated it so much I purchased an x large for him for Christmas. Of course that has not come yet. I wish you would advertise it for food storage as well, even though that may carry a liability based on the frozen content. However I do enjoy cold beer in the Dry Tortugas on day 3.