This 1.5L, wide-mouthed OMEGA stand-alone hydration system will integrate with a load-bearing belt, web harness, or can be stowed inside a ruck. Or combine the Pakteen with larger CamelBak systems for enhanced water capacities. 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.