A refillable plastic sack that provides clean water economically in areas of need, while saving trees from being cut down for boiling and purifying water.

The Jury says
The solution addresses a critical issue, and solves both health and resource problems. 2.2 billion people don’t have access to safe drinking water. About 1 billion of them rely on wood or charcoal to boil their water, resulting in a CO2 emission of 600 kg per person per year. SolarSack purifies water naturally by using the UV properties of sunlight. Furthermore, the team has created a very good business model for the distribution and use of this product which can inspire other impact entrepreneurs. A brilliantly simple design that is easy to understand and fits very well into its context of use.