Enter for your chance to win a LifeStraw Go Water Filter Bottle. Hollow fiber membrane removes 99. 9% of bacteria (including E. Coli and salmonella), parasites (including Giardia and Cryptosporidium) and micro plastics. Activated carbon capsule improves taste by reducing chlorine and Organic chemicals (pesticides, herbicides, voc). Rigorous testing: 0. 2 micron pore size removes turbidity and micro plastics. Long lifetime as the hollow fiber membrane will filter 4,000 liters (1,000 gallons) of water with proper use and maintenance.