Canteens are a thing of the past. Look to the future with CamelBak's Pakteen. This 50 oz. [1.5 L], wide-mouthed OMEGA stand-alone hydration system will integrate with a load-bearing belt, web harness, or can be stowed inside a ruck. Easy-to-fill and clean wide-mouth OMEGA opening, rugged and durable Water Beast material, leak-proof screw-cap, insulated PureFlow tube, patented Big Bite Valve, HydroLock one-handed flow control.