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Camelbak's 100 oz UnBottle provides an additional amount of water for those extra long hikes or rides. Designed with attachment points and a carry handle/hanger loop, the insulated sleeve can mount on your hydration pack or other bag and comes with a BPA and BPS-free 100 oz reservoir, with a wide mouth opening and external 1/4-turn easy open/close cap. It comes with a PureFlow drink tube, Camelbak's patented Big Bite Valve for easy spill-free drinking, and HydroGuard anti-microbial technology embedded into the reservoir wall to inhibit bacteria growth.