Back in the late 1970s, Bill Tolle of Woodlawn, Ohio figured out a way to use empty beer cans to heat his home in the winter. Basically he made a solar heater, with the empty cans trapping the sun's heat. But the beer can angle perked the media's interest.
This shower recycles, purifies and then reheats the same water over and over again -- saving water and electricity. Designers claim this shower will use up to 30 times less water and a fraction of the electricity. Since the water is already warm, it needs to be reheated less than cold water. Users would save thousands in energy costs.
Let us all hail the great American tradition of amateur inventors, personified today by the forgotten Herb Bartlett, whose love for hovercraft extended to making his plans available to the youth of the USA, contacted through his ad in Boys' Life magazine