"Worn around the neck and used like a regular straw, Lifestraw claims to filter 99.9999 percent of bacteria and 98.7 percent of viruses using a halogen-based resin."http://www.treehugger.com/files/2008/02/lifestraw_world_changing.php
"Worn around the neck and used like a regular straw, Lifestraw claims to filter 99.9999 percent of bacteria and 98.7 percent of viruses using a halogen-based resin."
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