LifeStraw Go Series is the ultimate sidekick for safer, better-tasting water for travel and everyday use. The 18oz stainless steel BPA-free bottle filters out nasties, so you can fill up from airport bathrooms, a tap in Mexico, or a gas station while road-tripping, and the slim design fits in most car cupholders! The advanced 2-stage filter improves taste and protects against bacteria, parasites, microplastics, chlorine, silt, sand, and cloudiness. For every purchase, a child in need receives safe drinking water for a year. Product Features LifeStraw Go Series is the ULTIMATE TRAVEL SIDEKICK. The 18oz stainless steel BPA-Free bottle filters out nasties so you can fill up from airport bathrooms, a tap in Mexico, or a gas station while road-tripping. SLIM DESIGN: The 18oz bottle s slim design means it easily fits in most car cupholders and backpack sleeves. IMPROVES TASTE: the Carbon filter reduces chlorine, odors + organic chemical matter FILTERS OUT CONTAMINANTS: the Membrane microfilter protects against Bacteria (including E.coli + Salmonella), Parasites, Microplastics, sand, dirt, and cloudiness 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. SAVES WASTE: The membrane microfilter lasts up to 4,000 liters. That s 8,000 single use plastic water bottles out of our parks, our oceans, and our communities. For every purchase, a child in need receives safe drinking water for a year. Product Specifications 18 fl oz | 500 mL 500 mL | 468 g Height: 28cm | 11in Diameter: 8cm | 3.14in Replaceable filters & parts