We’ve all seen pictures of women and children in developing countries lugging heavy containers of water. Transporting water often takes an inordinate amount of time and energy, and unhygienic containers can pose serious health hazards.

Hans Hendrikse, a South African architect, worked with his brother to design the Q-drum, an energy-saving, hygienically sealed, tough but easy-to-use rolling water-drum that can be pulled without strain by one adult or two children.