We love our Icemule. We packed up early in the morning for a day of kayaking. We put in ice packs and our picnic items. The Icemule was in direct sun all day. By the time we returned home late that evening, the ice packs were only about a third of the way thawed. It’s our go to ice chest for outdoor activities and traveling. It works great and is easy to carry. 
We were so impressed with the Icemule that we have purchased them as gifts for family members.