Showers that reuse your soapy water.

The OrbSys shower claims to save up to 90 percent of the water you'd normally use to get yourself clean by catching and sending it right back to you. Don't worry -- the dirty, soapy water goes through a purification process first, before it emerges as drinking quality at a higher-than-average pressure. And because the used water only needs to be reheated slightly, the shower saves up to 80 percent in energy, or about $1,350 per year from the average utility bill. Swedish tech company Orbital Systems developed the shower with NASA's Johnson Space Center, having been inspired by the designs used in space missions, where fresh water is obviously limited.