Clean, fresh water, wherever you go This all-in-one solution provides a continuous supply of safe, great-tasting drinking water. Just fill with water and as you drink the activated charcoal filter removes sediments, contaminants, chlorine taste and up to 99.9% of harmful giardia, cryptosporidium and other pathogens. A thick-walled activated carbon filter provides greater effectiveness and longer life than common thin-walled filters. The 22oz. bottle fits most bicycle water bottle cages and backpack pockets.