For a lightweight and fast solution to clean water for the outdoor enthusiast or traveler on the go, choose the Sawyer Water Filtration bottle. Simply fill up the water bottle with unfiltered water from a lake or stream, screw the cap on, and drink instantly. This water filtration bottle allows you to incorporate ice and or a powdered drink mix into the bottle without affecting the filtration capabilities of the filter. The included cap fits a standard 63-mm threaded bottle making it adaptable to other water bottles. When the filter starts to slow down, simply back wash it using the provided faucet adapter. A great solution for days out boating or day hiking, carrying in a back pack or canoe, in your ski pack. This is a great alternative when you can"t carry all the potable water you need in the field when hiking, hunting or adventure travelling internationally. Included is a 0.1 micron absolute Sawyer PointOne hollow fiber membrane, 1-liter durable bottle with cap, 2 replacement drinking straws, and a cleaning syringe.