The LifeStraw Sip utilizes an innovative high-flow membrane to efficiently filter out bacteria, parasites, and microplastics. Reusable and durable: the filter lasts up to 1,000 liters - more than a year with daily use. The SIP straw is made of high-quality stainless steel with a silicone mouthpiece, BPA-free and FDA-approved. Each LifeStraw SIP comes with a premium, leak-proof carrying case, allowing you to take it along and drink tap water worry-free in hotels and restaurants or during international travel. LifeStraw is proud to be a certified B Corp and climate-neutral brand. Your purchase makes a difference: for every LifeStraw product you buy, a needy child receives safe drinking water for a year.