FEATURES of the Sawyer Micro Squeeze Water FilterUltra-compact, lightweight, and reusableRemoves 99.99999% of bacteria (salmonella, cholera and E. coli) and 99.9999% of protozoa (cryptosporidium and giardia)Rated up to 100,000 gallonsComes with a 32-ounce reusable squeeze pouch, drinking straw, cleaning coupling, spare gasket, and cleaning plunger. Features Works for up to 100,000 gallons Includes 32 oz. collapsible pouch, backwashing plunger, cleaning coupling, spare gasket, and drinking straw Best used when hiking and backpacking