Protects Against Bacteria (Including E.coli And Salmonella), Parasites (Including Giardia And Cryptosporidium), And Microplastics. Ultralight + Long-lasting: Only 1.7oz; Membrane Microfilter Lasts Up To 2,000 Liters. Highly Versatile: Screws On To Standard Water Bottles. Fast Flow Rate: 3l/min – Fill Up A 1l Bottle In Just 20 Seconds.