I've got Yeti, Rtic, orca, and a Grizzle maybe it's grizzly, anyway I can't tell 2 cents worth of difference in cooling . As someone said above precook . I sometimes run cold water about half full for a couple hours , then put a couple 2 liter frozen bottles in . But that's only if I'm serious . Usually 1 bag of ice and go . Look for a sale ….