When will these show up at the marina?

A fully portable, lightweight, compact, floating hot tub designed with the space and power limitations of boats in mind. TugTub™ uses water from the ocean, the lake, or your dockside hose. Takes only about an hour to fill and heat to 104° F. Then it’s time to go Float and Soak!

How does it heat the water? 12v 40 watt heater. Uh, well, I guess floating off the back of the boat at night could be fun, under the stars, with the bugs, draining the battery. Maybe not.