Lifestraw Go Series Filter Bottle 22ozFILTERS OUT CONTAMINANTS: the Membrane microfilter protects against Bacteria (including E. coli + Salmonella), Parasites (including Giardia and Cryptosporidium), Microplastics, sand, dirt, and cloudiness IMPROVES TASTE: the Carbon filter reduces chlorine, odors + organic chemical matter LONG LASTING: The membrane microfilter lasts up to 1,000 gal (4,000 L) about five years of daily use. Carbon filter lasts up to 26 gallons (100 L) about two months.