So I bought the 20L PRO yesterday to bring on my beach trip and it worked fantastic. I filled it with 16 cans and 10 pounds of ice at 6 am. It was in direct son light for 4 hours and it it now 9:00 pm and still has plenty of ice. It out lasted my 25 roto cooler. Best part about this cooler is with all the way it was very easy to haul around and be hands free.