Natural Water cooler
Arvindbhai Ranchhodbhai Patel of Gujarat created a low cost, energy efficient, environment friendly water cooler, which cools water naturally. It is based on the principle of heat exchange. The cooling process does not require external power source for operation. The technology has tremendous potential in dry and hot climatic conditions (i.e. tropical) where electricity is not available. This product was introduced in the market in the year 2005.