Christophe Noel
Expedition Leader
All of the root-molded coolers by Yeti, Engle, Pelican, Canyon, NRS, etc, will have a similar efficiency and correlating price. Your non-roto-molded choices will produce a variety of less than awesome levels of efficiency. These things have been tested ad naseum, and the value winner is usually the Coleman Extreme. Just know that QC sometimes falters which is why some have great luck with them and others not so much.