The Kooler is the World’s only cooler within a cooler. Designed by Stan “Rhino” Efferding, the Worlds Strongest Pro Bodybuilder to keep all your pre, during, and post-workout drinks separated inside one ice-cold container. The Kooler is 1.3 gallons. The outer reservoir holds 1 gallon and the shaker bottles take up the remaining space. Each …
