If you fill a boat with water, won’t it sink? I guess not with the Hot Tub Boat. A boat that IS the hot tub. Get in the water, while you’re in the water, without being the actual water. Right? Anyways… Your own private 16′ luxury yacht. Cruise up to 5mph for 10 hours in your 104 degree hot tub. Steering is done by the joystick at the aft.