A gravity based dispenser for use with a bottle of liquid. The dispenser hangs about the neck of a user and allows the user to selectively dispense water from the water bottle while the user maintains a valve of the dispenser in an open position. In a closed position, the valve of the dispenser prevents the flow of liquid from the bottle to which the dispenser is attached. The valve is biased to the closed position. In this way, a user may use water to wash their hands using a single water bottle without using unnecessary quantities of water.