I borrowed one from a nephew, for a recent trip up there. I'll have to say, I was impressed. I froze bottles of water, put them in the cooler July 6th. When I got home on the 15th, the ones that were still in there were still frozen.
Not saying a cheaper 7 or 10 day version wouldn't do the same, but I had never used a cooler that kept that cold being opened several times each day.
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