What Our Gearhead(R) Experts Are Saying: "I've taken this bottle through airports, road trips, and trail days, and I love how confidently I can fill it up anywhere. The membrane filter handles the heavy lifting, the carbon filter makes water taste clean, and the stainless steel keeps it cold all day. It's become my no-brainer travel bottle." The Go Series Stainless Steel 24oz Tumbler gives us the freedom to fill up wherever our adventures lead. LifeStraw pairs rugged stainless steel construction with a two-stage filter that transforms questionable taps-from roadside stations to airport sinks-into reliably clean, great-tasting water. The membrane microfilter blocks bacteria, parasites, and microplastics while the activated carbon filter improves taste by reducing chlorine, odors, and organic contaminants. We appreciate how seamlessly it fits into daily life, too. The double-wall vacuum insulation keeps water cold from morning commutes to late-day hikes, and the integrated handle makes it easy to grab and go. With long-lasting replaceable filters and the ability to offset thousands of single-use plastic bottles, this bottle earns a spot in our pack whether we're traveling abroad, hitting the trail, or keeping hydrated at work.