Hydrologic: Following in the footsteps of International Development Enterprises's (iDE) long tradition of expertise and know-how, Hydrologic today is an independent legal entity and social enterprise delivering safe drinking water to more than half a million Cambodian people through the well-known Tunsai CWP. In order to tackle the poor drinking water conditions in rural areas, Tunsai (rabbit) ceramic water purifier (CWP) was introduced by iDE in 2001.