Keg with an inner bag

An alcohol beverage container assembly comprising:

• a keg having a keg aperture;
• a bag contained in the keg for containing an alcohol beverage, the bag having a neck for supporting the bag in the keg, the neck having a peripheral wall portion sized less than that of the keg aperture, and the neck having a central passageway extending into the bag that is adapted to receive a beverage filling and dispensing valve assembly;
• and,
• an interlocking collar mounted in press fit surrounding relation with the peripheral wall portion of the neck, the collar having an outer peripheral wall portion sized larger than that of the keg aperture,
• characterized in that said keg has a flange defining the keg aperture and the collar has a recessed groove in the collar outer peripheral wall portion for receiving the keg flange in press fitting and sealing relation therewith, and the collar outer peripheral wall portion having a resilient edge portion adjacent the recessed groove that deflects to permit the interlocking collar to pass through the keg aperture and receive the keg flange in the recessed groove,
• wherein the interlocking collar has a plurality of locking passageways placed around the interlocking collar and axially extending through the interlocking collar between the neck and recessed groove, and the container assembly having a latch member with a plurality of locking fingers adapted to extend axially through the locking passageways to prevent deflection of the resilient edge portion of the interlocking collar.