The membrane microfilter effectively removes contaminants and protects against bacteria (including E. coli and Salmonella), parasites, microplastics, sand, dirt, and cloudiness that can be found in tap water and ice. With a sleek 500 ml stainless steel design, the cup fits in most car cup holders, making it ideal for commuters. The double-walled vacuum insulation keeps your water cool all day long. Additionally, the carbon filter enhances the taste by reducing chlorine, odors, and organic chemicals. The membrane microfilter is durable and lasts up to 4,000 liters, which is about five years with daily use. The activated carbon filter lasts for up to 100 liters, approximately two months. The cup is made without the use of lead sealing points, making it lead-free. LifeStraw is proud to be a certified B Corp and climate-neutral brand. With every purchase, you support an important cause: each product sold ensures that a child has access to safe water for a year. Included: stainless steel cup, BPA-free membrane microfilter, activated carbon filter, lid, and straw.