The original Yeti, which the brothers called the Roughneck, was boxy and utilitarian. The sharp corners were no fun to bang a knee on. Some of the coolers had a puzzling red stain on the bottom.

Yeti Coolers was started by two brothers, Roy and Ryan Seiders, in 2006. The fishing enthusiasts were dissatisfied with the coolers on the market at the time, which could not keep up with their ...