The safe and convenient way to drink clear clean tasting water anywhere is the Water Bottle and Filter system. This water bottle requires no pumps or hoses, and no special fittings, just “fill and go”. The Water Bottle and Filter system includes a high quality 22oz. (650ml) Nalgene® Sport Bottle with a sturdy push pull valve system and polycarbonate flip cap to keep the drinking valve clean. A single filter treats up to 230 refills and replacement filters are available.