WirthCo 20420 Funnel King Waterboy Battery Filler, 2 quart (Double Action Valve-Shut Off Nozzle) Water boy Battery Filler is the most efficient and reliable way to fill your battery Double action valve with shut-off nozzle stops the flow to prevent overfilling Heavy injected molded body provides long lasting durability Big 2 Quart Capacity allows you to keep filling