Turn your CamelBak 2L Crux Filtered Reservoir (not included) into a gravity bag setup with the CamelBak 2L Crux Filtered Reservoir Gravity Kit. Designed to replace the Crux's drinking tube, this kit makes it easy to pour clear, filtered water out of the reservoir.Manufacturer model #: 2562401000. Turns Crux Filtered Reservoir (not included) into a gravity bag Replaces the Crux's drinking tube Lets you pour clear, filtered water out of the reservoir