There are almost a billion people in the world thirsting for change. You can probably walk across the room and turn on a tap for a clean drink of water. But for far too many, that walk takes hours, and results only in filling containers (typically 20 liter jerry cans) with dirty water from a river or pond. This lack of access to clean drinking water has reached epidemic levels, even though simple, cost-effective solutions exist. 20 Liters is currently making an impact in Masaka, Rwanda.