Bottle cap including an additive dispenser

摘要: A cap includes a plunger member including cavity portion integral therewith and extending downwardly therefrom. The is capable of containing additive therein lower having an opening for dispensing the into container. receiving receives threaded engaging spring preferably disposed between neck becomes compressed when moved towards down position. membrane extends across container engages at up may be formed from aluminum foil so that it can penetrated to position thereby allow pass therebelow introduced