Early in his career, serial inventor Dean Kamen made a wheelchair that could climb stairs. While it never gained widespread adoption, he adapted this technology to launch his famous Segway transportation device in 2001.After Segway's launch, Kamen began working on a project close to his heart: a water purification device for the developing world. But he needed help getting it distributed. Given its global reach, Coca-Cola was an ideal partner.In exchange for getting the water purification device out there, ...