I just used this with a Costco case of 20 oz drinks (24+). I had them in the fridge overnight Thursday, loaded them Fri morning and headed to camp for the next 48 hours. I only had 2 frozen 1 quart water bottles and the center divider (pre-frozen) to keep things cold in the cooler. Despite the typical opening and closing as others grabbed things, the drinks were still cool 48 hours later (with an ice chunk still in the bottles). I kept it in the shade over direct sunlight etc, but it was still 80+ out during the day and not much to keep them cold. If I'd loaded it with ice, I'd imagine them staying even colder (and seen other coolers in one day thawing a couple frozen bottles like that). So this seems pretty good at a lot less cost than many out there.