The Dutch Tub is like an old-fashioned wood fired hot tub, but it uses a more advanced coiling system to heat up the water. On top of that, it’s also a barbeque complete with a wok that sits on top of the fire. If that’s not enough, consider that it’s relatively light, which means higher portability. Essentially, you could bring your hot tub camping! http://www.dutchtub.com/