PackH2O WaterWear backpack from Greif, Inc. and Impact Economics offers a contaminant-free way for people to transport gallons of potable water. For the millions of people in the developing world who must travel for hours daily to reach clean drinking water, the WaterWear backpack is a safe and clean container for water. The company claims that the backpack is economically viable for developing economies and disaster relief. The ergonomically designed backpack stores up to 20 liters (5 gallons) of water and is collapsible when empty for portability. Made from recyclable materials, the backpack stands on its own when water is being pumped in or out.