LifeStraw Go Water Filter Bottle with 2-Stage Integrated Filter Straw for Hiking, Backpacking, and Travel, Clear Safe water on the go. The Life Straw go is an advanced water bottle with filter that reduces bad odours and improves water taste. The leak-proof, BPA-free bottle holds 22 Oz Of water is ideal for hiking, camping, international travel and emergencies. Simply fill with water from a lake, River or tap and filter on the go. Two filters offer advanced protection; a membrane microfiber (with a hollow fiber membrane pore size of 0. 2 micron) and an activated carbon filter. Your purchase has impact. For every Life Straw product purchased, a school child in need receives safe water for an entire school year.