How's his water purifier doing? Lots of press coverage up to 2012, then silence. It worked, but the cost of the prototypes was insanely high. It was supposed to become cheap.
"In 2011, Coke and Deka sent 15 Slingshots to Ghana for a six-month field test where they provided clean water to five rural schools. In fall 2013, Coke and its partners announced a goal to place up to 2,000 units (either standalone Slingshots or Ekocenters) around Africa, Asia, and Latin America by the end of 2015."
