Michael Lefenfeld’s Offbeat Power Play


Shortly after Michael Lefenfeld graduated from Washington University in St. Louis in 2002, his grandfather asked him to solve a problem. “He wanted something that he could take to the bathroom with him and drop in the toilet … an air freshener of sorts,” says Lefenfeld, who majored in chemical engineering. “I started thinking about how to volatilize a fragrant oil off the surface of toilet bowl water.”