I recently watched a new documentary about inventor Dean Kamen. He's the guy who invented the Segway, that impressive but only moderately successful people mover. Well, Kamen is back with a new invention called the Slingshot; a high tech solution that promises to turn even the dirtiest water into clean drinking water. Given the world's water crisis, you'd think there would be enormous potential for this sort of device. But in the film, Kamen's technology is repeatedly rejected by potential partners, which include the World Bank and United Nations, according to the film's director. Frustrated and out of options, Kamen ends up turning to Coca Cola; a decision that has been met with some criticism. Kamen is quick to defend his partnership with the company, which, he explains in the film, has bottling operations is 206 nations. "That's more than the number of countries that are admitted into the United Nations!" Kamen explains. "We realized if we could partner with them, they could be the link that takes our technology everywhere it needs to be."