What's the connection between the Segway and the SlingShot? I think a lot of people know the Segway. But do you know the inventor of the Segway? It's Dean Kamen. Kamen invented also a lot of medicine equipment, e.g. a transportable equipment that enables patients to perform their kidney dialysis at home. Kamen invented the SlingShot, too. The SlingShot is a water purifier that can produce clean water and doesn't need much electricity. The purifier doesn't need maintenance or chemicals. It works by vapor compression distillation. Billions of people don't have clean water or have to go long distances to the next well. One of Kamen's objective is that all these people can use his invention to get clean water. But there are some challenges: - The purifier needs electricity and a lot of people don't have it. - People without clean water are often poor, for that reason they cannot afford the SlingShot. - A man cannot transport the SlingShot alone therefore the distribution to outlying areas is not easy. I think, there will be solutions to overcome all these challenges. I can recommend the movie SlingShot. For example you can see it on Netflix.