Introducing the PolarPlunge by Coldtubs—the largest portable unit in their lineup. Designed for high-demand environments. Here's what COLDTUBS have to say about their PolarPlunch unit: The Polarplunge™ is our largest portable unit. It will fit 8-12 people at once. People can sit on bench seating for more full body cooling or just on the edge if only treating the legs. All of our tubs plug into a Standard 110v wall outlet, fit through a Standard doorway, are filled up with a garden hose, and have temperature ranges from 42º – 104ºF.