The sun shower lets you tan while you shower. The installation looks a little bit hardcore, but overall a tan in the shower would be pretty cool. Note that the promo film was banned in America, but it isn't too shocking.
The Sentavi site describes, "With this product, Sentavi brings all the goodness of the sun into your bathroom. This exclusive system allows you to tan while taking a shower. Your bath time ritual becomes a delightful experience of water and light, giving you the feeling of freshness and warmth. Sunshower brings beauty, relaxation and harmony of body and mind. Looking great with a minimum of effort! The Sunshower offers a sensible way of tanning, so that a healthy tan can become part of your daily beauty routine and it will stimulate the production of vitamin D."