Patent ID: 8485353

Claim:
A cap assembly mounted on a neck of a container for containing an ingredient different from that accommodated in a container, comprising: a cap body comprising a mouth and an inner housing formed with a chamber, a lower end opening and an upper opening; a working member adapted to be assembled to the cap body, the working member comprising: an upper end portion in sealing contact with the upper opening when the working member is in an initial position; an extended part having a lower end, the extended part extending through the chamber of the inner housing such that the ingredient in the cap assembly is contained between the inner housing and the extended part; and a lower sealing portion provided at the lower end of the extended part to seal the lower end opening when the working member is in the initial position; and when the working member with the extended part is upwardly moved from the initial position, the lower sealing portion is moved out of sealing contact with the lower end opening to drop an ingredient in the chamber into the container so as to be mixed with an another ingredient accommodated in the container to form a mixture and the upper end portion is moved out of sealing contact with the upper opening so that the mixture may be discharged through the upper opening.