Upgrade your hydration pack, or retrofit another bag with the CamelBak Omega Deluxe Bladder. Included flowmeter lets you know how much you are drinking. Flowmeter accurately reports how much water has been drunk, or how much is left. Quick disconnect port lets you easily remove the hose while automatically shutting off flow. Ergo Hydrolock valve keeps bite valve at easy to drink angle and allows easy lock off of flow. Made of super strong polyurethane. The large porthole makes accessing and cleaning your reservoir easier than ever. Secure cap prevents any leakage. 100 oz. bag roughly equivalent to 3 liters.