Safe water on the go. The LifeStraw Go is an advanced water bottle with filter that protects against bacteria, parasites, microplastics, chemicals, like chlorine, in addition to reducing bad odors and improving 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 Microfilter (with a hollow fiber membrane pore size of 0.2 micron) and an Activated Carbon filter. LifeStraw filters are rigorously tested to meet protocols established by the US Environmental Protection Agency (EPA) and NSF International/ANSI. Your purchase has impact. For every LifeStraw product purchased, a school child in need receives safe water for an entire school year.