The Dutch Tub - portable hot open air bath
Living in the green and not liking cold water that much myself especially since this hemisphere is - despite global warming - manufacturing only cold weather all the time I ultimately love the idea of this dutch invention. With a simple but cleverly designed wood heater outside the tub and a lightweight tub itself this is a good addition to any northern hemisphere garden - but apparently you can also take it with you - strapped on the roof of any car - to the alps or such. Sadly as always with nice inventions its on the pricey side for around 4000 Euros. They also have it for rent.