This is a video from the Water for Thought: Life-Changing Design exhibition held in London from 25 January to 23 March 2013. The Hippo water roller is shown at 50 sec. and 1min 50 sec.
Some of the World's most innovative product designs for accessing, transporting or purifying water in developing countries are on show at the Roca London Gallery. Do visit the Roca London Gallery Facebook page for more photo's and videos.
This video provides background to the exhibition and gives glimpses of the solutions on display.