The company Hammacher Schlemmer in Seattle has built an electric boat with a hot tub built into its deck.

It is a 16 foot boat and the hot tub is 8-foot long!
The water is heated by a diesel-powered water heater and when the pool is filled the boat weighs around 1000 kg. The actual boat is driven by an electric engine and controlled by a remote control. The boat has a top speed of 8 km per hour.
A built-in sound system at around 50-watts are also available as well as four separate cooler compartments for drinks. This boat is yours for 32.000 euros, according to gizmodo.com.
This text is found on the manifacturer’s website:
Engineered and built in Seattle, WA by a marine carpenter that specializes custom house boats, in customized house boats, the craft’s Vinylester hull is topped with a slatted deck handcrafted from African teak. The hot tub measures 8′ L x 4′ W x 24″ D and is positioned on the boat’s center of buoyancy, providing the boat exceptional stability. It drafts only 20″, even when filled with its maximum load of 2,100 lbs. of water and six adult bathers. An integrated diesel-powered boiler with an adjustable thermostat heats the tub’s water to a maximum 104° F. A waterproof stereo system plays music from your MP3 player through two flush-mounted 50-watt speakers that pop-up from the deck. Four ice chests built into the deck provide ample storage for your preferred libation with additional storage compartments fore and aft. A teak swimstep provides easy entry into and from the surrounding water. A 24-volt electric motor propels the boat up to 5 mph on calm water, steered via a joystick by a bather located starboard/aft. Its rechargeable battery bank provides up to 10 hours of power from an overnight charge using its built-in Smart Plug shore power connection and on-board chargers. Includes hot tub cover. Special conditions and guarantee limitations apply.
Source: Hammacher.com
