Enjoy safer, better-tasting water during your travels or daily routine using the LifeStraw Go Series Insulated Stainless Steel Water Bottle with Filter. The stainless steel, BPA-free bottle filters out contaminants through the advanced 2-stage filter. A membrane microfilter removes 99.99% bacteria (including E.coli and salmonella), 99.999% parasites (including giardia and cryptosporidium), 99.999% microplastics, sand, dirt, and cloudiness. The carbon filter improves taste by reducing chlorine, odors, and organic chemical matter. Double-wall vacuum insulation keeps water cool throughout the day (bottle not intended for hot beverages). The membrane microfilter lasts up to 1,000 gal. or approximately 5 years of daily use, replacing 8,000 single-use plastic water bottles. Carbon filter lasts up to 26 gallons or approximately 2 months with daily use. Meets NSF 42 standard for chlorine reduction. Meets US EPA and NSF P231 drinking water standards for the removal of bacteria and parasites. For every purchase, a child in need receives access to safe drinking water for a year.Manufacturer style #: LGV42SBKWW. Stainless steel, BPA-free bottle Advanced 2-stage filter Membrane microfilter removes bacteria and more Carbon filter improves taste Double-wall vacuum insulation keeps water cool