This sports bottle is the solution to being green and getting great water on the go and energize you body in the process. With the bottle and two replacement filters you are spending 12 cents per refill for 21 oz. of water. Whether you travel, work out, or wherever you are, hydrate with an alkine water tha is posting numbers sometimes as high ast 9.2 Contact John St. John at 713-725-1842 or www.nikken.com/jsj and you can order directly without any phone call.