The LifeStraw Go Series Tumbler delivers clean, filtered hydration on the go with a built-in membrane microfilter that removes bacteria, parasites, and microplastics from virtually any water source. Its slim 18 oz stainless steel design fits most car cup holders, making it ideal for commuting, travel, and events. Every purchase contributes to providing a child with safe drinking water for one year, adding a meaningful story to every branded giveaway.