With the Hippo Roller, a revolution in fetching water rolls on

After realizing the difficulty that people in South Africa were facing when carrying water back to their communities, two South African engineers devised a machine "that brings all the water back in one trip by rolling it." Users report that while it does not perform well on steep terrain, it can carry much larger amounts of water "effortlessly and in a single trip." So far, 60,000 of these large plastic drums have been sold, but the cost of the machine is often a barrier for those who live below the poverty line.

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