Two cigarette lighters with clear plastic fuel reservoirs are new to the market. Each sells for about $5. At left is the Ritepoint Liter, made by the Ritepoint Co., St. Louis, Mo. It is available in four different colors. The fuel supply is transferred to the wick as needed by a finger-touch valve.
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.