What Our Gearhead(R) Experts Are Saying:"The Go Series bottle is the one I recommend when someone wants filtration built in rather than bolted on. Fill it from a creek, drink straight through the mouthpiece, and the two-stage system handles bacteria, parasites, and even that chemical taste from treated sources - all in a bottle that fits a standard pack pocket."The creek looks clean, but looks aren't enough. The LifeStraw Go Series Water Filter Bottle closes the gap between a promising water source and a safe, great-tasting drink, putting a full two-stage filtration system inside a 22-ounce bottle that fits neatly into a pack side pocket. No pump, no waiting - just fill, drink, and keep moving. The membrane microfilter works down to 0. 2 microns, physically removing bacteria, parasites, microplastics, and sediment from whatever source is available. An activated carbon element handles the second stage, pulling out chlorine, organic chemicals, and the off-flavors that make treated water unpleasant to drink. The membrane filter is rated for up to 1,000 gallons before replacement, making it a long-term companion for everything from weekend camping trips to extended backcountry travel. Built from 50% post-consumer recycled plastic and compact enough to carry every day, the Go Series bottle makes clean water a given rather than a concern.