US Patent 9061813 Liquid metering assembly

A liquid metering assembly is described and which includes a container for enclosing a source of liquid to be dispensed, a container cap defining a dispensing aperture, and a vent aperture, and which is releasably affixed to container; a movable diaphragm releasably cooperating with the container cap, and coupled in fluid flowing relation relative to the dispensing aperture; and a movable liquid volume control member which cooperates with the movable diaphragm, and which further allows a user to withdraw a given volume of liquid from the beverage container.