The Waterwheel

Reminds me of the &quot;hippo roller&quot; <a href="http://en.m.wikipedia.org/wiki/Hippo_water_roller" rel="nofollow">http:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Hippo_water_roller</a> That was invented in 1997, basically the same thing, but appears larger, plus with the simpler design is probably cheaper.<p>Edit to add: it&#x27;s actually one of the reasons I am majoring in mechanical engineering, completly restarting from the ground up is fine, but seeing a weak link and improving it is often far more cost effective. I can just imagine someone seeing a barrel fall on its side and roll down a hill and their eyes lighting up.

Pretty cool concept, i really like things like this. Small and incremental changes that improve the daily life of real people.<p>We dont always have to go after huge problems with complicated sweeping changes that are hard to implement and use for the people that need help the most, sometimes just making a small improvement can make a larger impact on a persons life.<p>I like how they didnt think the solution was to have universal plumbing in India, a mammoth task, which would cause huge disruption, be costly and difficult, instead carrying 3x - 5x more water capacity is a huge improvement in someones life that has to make journeys to a well every day.<p>What other things can we do like this?

Looks like a nice design. Does anyone know what &quot;cap-in-cap&quot; refers to in the sentence &quot;The WaterWheel’s cap-in-cap design prevents recontamination at the point of use&quot;?