I bought two of these coolers for a high country trip.  I dumped some ice in from my freezer intending to stop and get more.  Needless to say I forgot to get more ice.  Didn't need it though.  There is still ice in the coolers after 2 weeks.  Ambient temps have been from 20-60 degrees.  Not only that one of the coolers had a Rzr 4 seater about crush it on the ride home.  After removing the rzr the cooler has a small scuff.  I'm super impressed!!  Way to go Lifetime!