The LifeStraw Go Series Stainless Steel Filter Bottle filters out bacteria, parasites, and sediment while removing foul flavors so we can enjoy fresh, clean water from mountain streams and suspicious taps. The vacuum-insulated water bottle has a two-stage filtration system built directly into the bottle, so we don't need to fuss with hydration bladders and finicky systems; we can just scoop up our water, screw on the lid and have reliable, refreshing water no matter where our adventures take us.