I have a 65qt Engel that I got, NRA instructors get a discount, so I think I paid 220 shipped, something like that, and they sent a ton of koozies to go with it. I put two 25 pound bags of ice in it on a Thursday night, left cooler in utility room. Opened it Sunday night, and still had 3/4 or better of the ice left. Typically, with no precooling, I can load it up Saturday AM with a ton of warm bottled water, beers, gatorades, put it on the boat, use it all day, and it gets opened a lot with 4-6 adults and 4 kids on the boat...I'll leave it on the boat since its so heavy, and just refill it Sunday with more warm drinks, and still have ice, and cold drinks when I get home. Same results usually for a 3 day weekend if I go with the 20-25 pound bag of ice. Group we go with, we used their Coleman extreme last weekend, and within an hour of being on the water, most of the ice was gone..