http://ruralindia.blogspot.com/2008/07/rollable-water-container-innovation-for.html
“”It appears that these two ideas are considered in inventing the following water container Q-Drum (patented) in order to fetch water. Of course, it is apparent that this is a natural invention considering that “Wheel” was the human’s first scientific invention in transporting goods. Cost of this container is unknown.
Coming to its design or technical [...]
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