Abstract: An apparatus for adding a secondary substance to a primary liquid within a sealed container, for example, a shot of liquor to be added to a can of soda. A secondary container contains the secondary substance preferably a liquid and has a frangible seal. A mechanism sealingly and mechanically attaches the secondary container to the hull of a primary container having primary liquid. A frangible seal is provided to the secondary container. A penetrator is disposed at least partially within the housing of the secondary container and is at least partially surrounded by the attachment mechanism. The penetrator causes rupture of the seal and mechanically penetrates through the hull of the primary container. The substance from the secondary container mixes with the liquid of the primary container. The secondary container may attach to the top, side, or bottom of a conventional primary container, a soda can.

Abstract: A device for selective attachment to a conventional aluminum beverage can with internal liquid-holding pouch. A flavoring, alcohol based, energy drink, a medication, etc. can be contained in the device and mixed with the liquid contained in beverage cans. With the device atop a can and the device and can opened, tilting and pouring the liquid of the can causes liquid within the device to be dispensed and entrained into the stream of the liquid exiting the beverage can. A mixed drink can be provided comprised of the first liquid of the device and the second liquid provided by the can. Substantially uniform concentration of the two liquids is maintained from start to finish. Mixing occurs on an incremental basis and there is no substantial mixing of liquid from the device within the chamber of the can or from the liquid of the can within the cavity/pouch of the device.