AmeriGlo Glock Rear Sight Tool Straight Sided All Heights GTOOL1 Removes minimum 99.9999% of waterborne bacteria. Award-winning LifeStraw has been used by millions around the globe since 2006. Removes minimum 99.9% of waterborne protozoan parasites. Filters up to 1000 liters of contaminated water without iodine, chlorine or other chemicals. 3 Pack.