"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."

- http://www.popsci.com/article/science/pure-genius-how-dean-k...

I think they are slowly getting out there, but they're still very expensive.