For a tiny house or small studio apartment, a folding shower just might be the answer. This shower when folded up looks like a built-in cabinet. It is easy to install and remove and comes in several different colors. The shower uses thermostatic valves to pour hot and cold water for a relaxed shower experience. You can learn more at the Supiot website. If you are the do-it-yourself type person, take this idea and create your own version.
It appears this company has gone out of business since this post was published in 2011.