Patent ID: 6994211

Claim:
A cap device for a bottle, said cap device comprising: a cap body tightened to an externally threaded mouth of said bottle; a funnel part integrally having an open lower end formed in the cap body; a cap cover assembled with the cap body to cover an open upper end of the cap body while defining a cavity inside both the cap body and the cap cover to contain an additive in said cavity; a conical valve part for opening and closing the lower end of the funnel part with a rotating action of the cap body relative to the externally threaded mouth of the bottle; a plurality of radial ribs extending outward from an external surface of the conical valve part in radial directions; a ring integrated with outside ends of the radial ribs so as to be supported on an inner surface of a neck of the bottle; a plugging shank extending upward from a valve holder of the conical valve part; internal threading formed on the lower end of the funnel part; and, an external threading formed around the plugging shank such that the external threading of the plugging shank has the same pitch as said internal threading of the lower end of the funnel part.