The new Sawyer Squeeze Filter is an exceptionally light and versatile water filtration system. With a total field weight of 3 ounces and the ability to roll up into a compact package, it hardly takes up space in your pack. Included with the filter are 3 pouches in 3 sizes: 0.5 liter, 1 liter and 2 liter that can be reused hundreds of times. To use, just fill pouches at a lake, stream or river; screw the filter directly onto the pouch and squeeze the bag of filtered water into a water bottle or container. You can also drink directly from the filter which has a built in push/pull cap for on/off functions. You can also attach the filter onto most threaded bottles including 2 liter soda bottles. Travel with the Sawyer Squeeze Filter when visiting areas where tap and bottled water are not entirely safe to drink. It is the perfect choice when hiking, hunting, camping, out on a canoe trip, or adventure travel trip.