Patent ID: 7249690

Claim:
An independent single use unit dosage dispensing closure comprising: a shell attached to a container, the shell having an outer skirt with a closure attaching mechanism on the outer skirt for attaching the shell to the container, the shell having an inner guide, wherein the inner guide is an annular tube having at least one annular seal; an axial movable cap attached to the shell and moveable along the inner guide, the cap having a chamber therein holding a unit dosage of material to be dispensed into the container, wherein each annular seal is engaging and sealing against the cap throughout movement of the cap; a sealing layer coupled to the cap, wherein the chamber is sealed with the sealing layer extending across a lower open end of the cap, wherein axial movement of the cap along the inner guide will cause the sealing layer to rupture or be removed to dispense contents of the chamber into the container; and a retainer removeably secured to the cap and the shell preventing relative movement between the cap and the shell until the retainer has been removed.