Pumping beer too quickly leads to excess foam, so bar patron turned inventor Matt Younkle designed the TurboTap to reduce the turbulence of fast-flowing beer. The tap's tapered interior limits the beer's acceleration, and an internal diverter sprays it across the bottom of the glass. The result-now available at ballparks and bars-is a perfect pour in half
the time. $100
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.