[Dean] Kamen is the closest thing to a modern-day Thomas Edison. He holds hundreds of patents, and his creations have improved countless lives. His current projects include a robotic prosthetic arm for DARPA and a Stirling engine that generates affordable electricity by using anything that burns" for fuel. The Slingshot, more than 10 years in the making, could have a bigger impact than all of his other inventions combined. Using a process called vapor compression distillation, a single Slingshot can purify more than 250,000 liters of water per year, enough to satisfy the needs of about 300 people. And it can do so with any water source-sewage, seawater, chemical waste-no matter how dirty. For communities that lack clean water, the benefit is obvious, but to realize that potential, the Slingshot needs to reach them first. Which is where Coke comes in: The company is not just a soft-drink peddler; it is arguably the largest, most sophisticated distribution system in the world. That's important because the scale of the water crisis the world faces is unprecedented. Water seems so abundant it's easy to forget how many people don't have a clean source of it. According to the World Health Organization, nearly a billion people lack ready access to safe drinking water, and hundreds of thousands die every year as a result.. Kamen, being Kamen, sees the current goals of the Coke partnership as the first step toward a much larger one. "Fifty percent of all the people in the developing world suffer from waterborne pathogens," he says. "We'd empty half the beds in all the hospitals in the world if we just gave people clean water."