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.