The HotTug is a hybrid hot tub/boat that lets you enjoy a warm bath while you sail down the canal, harbor or lake. The wood-fired tub seats six to eight people and features a stainless steel stove. It can contain up to 2,000 liters of water, heating it up to a nice warm temperature of 38° Celsius (100° Fahrenheit) in around three hours. You can empty it out with a submersible pump in twenty minutes.
The HotTug is a Dutch invention. It's made from wood and fitted with glass fiber reinforced polyester. It is available with either an integrated electric motor or an outboard engine.