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Removes bacteria parasites The microfiltration membrane removes 99.999999 of waterborne bacteria including E. coli and salmonella, and 99.999 of waterborne parasites including giardia and cryptosporidium. Removes microplastics Removes the smallest microplastics found in the environment down to 1 micron, and reduces turbidity down to 0.2 microns. Rigorous Testing All claims are verified with laboratories using standard testing protocols set by the US EPA, NSF, ASTM for water purifiers. Long Lifetime The microbiological filter will provide 4,000 liters 1,000 gallons of clean and safe drinking water with proper use and maintenance. Make an Impact For every LifeStraw product purchased, a school child in need receives safe drinking water for an entire school year.BPA Free materials.