Patent ID: 8172079

Claim:
A secondary container of a secondary substance for selective mixing with a primary liquid within a sealed primary container comprising an outer, thin-walled hull having its own opening, comprising: a sealed first chamber for said secondary substance within a housing defined by the secondary container; a frangible seal initially maintaining said secondary substance within said chamber; attachment means for mechanical and leak-proof attachment of said housing to the hull of the primary container in an orientation that places said frangible seal proximate to the hull of the primary container; and a penetrator, a component of said housing, said penetrator adapted to be moved to penetrate through the hull of the primary container, the penetrating movement of said penetrator also causing said sealed chamber to become unsealed by piercing of said frangible seal; wherein piercing and penetrating movement by said penetrator of said frangible seal and hull of the primary container, respectively, results in said penetrator being at least partially surrounded by said attachment means for a liquid seal between the primary container and said secondary container and also allows said secondary substance to mix and pour with the primary liquid, wherein said housing further comprises at least one, initially partially empty second chamber in communication with said first chamber holding said secondary substance, said second chamber of said housing providing a void volume to allow for the mixing of the primary liquid and said secondary substance when said frangible seal and hull are pierced and unsealed.