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LifeStraw is a water filter designed to be used by one person to filter water so that they may safely drink it. It filters a maximum of 1000 litres of water, enough for one person for one year. It removes 99.9999% of waterborne bacteria and 99.9% of parasites. The LifeStraw Family, a larger unit designed for family use, also filters out 99.99% of viruses. LifeStraw includes LifeStraw and LifeStraw Family, which are complementary point-of-use water filters designed by the Swiss-based Vestergaard Frandsen for people living in developing nations and for distribution in humanitarian crisis. LifeStraw Family filters a maximum of 18,000 liters of water, providing safe drinking water for a family of five for up to three years. LifeStraw and LifeStraw Family were distributed in the 2010 Haiti earthquake, 2010 Pakistan floods, and 2011 Thailand floods. In the Mutomo District in Kenya which has suffered from long term drought, the Kenya Red Cross supplied filters to 3,750 school children and 6,750 households. (via Freebase)