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A "LifeStraw" is demonstrated in Lausanne, Switzerland, Tuesday, November 29, 2005. LifeStraw is a simple device, still in a prototype phase, designed for those unfortunate people in the third world who do not have access to clean drinking water. The pipe is composed of two textile filters, followed by a chamber with beads impregnated with iodine. (KEYSTONE/Andree-Noelle Pot)