U.S. Two Quart Canteen Kit includes a bottle of 24 water purification tablets to purify three days worth of water, refilling twice per day if carrying only this canteen (assuming up to one gallon of water use per day; no extreme conditions that would increase water consumption higher). There is also a small MyTopo Waterproof Map in the kit. The black band is from a STRAC Pack of black bands of varying sizes. A folded bandana or handkerchief can act as a water filter also (od green handkerchief pocketed for video) #canteen #alicesystem #mytopo #waterpurificationtablets #hiking ... https://www.youtube.com/watch?v=idjtfAEqtRc