Patent ID: 7562782

Claim:
A cap structure comprising a cap removably to be screwed onto a bottle mouth of a beverage container body containing a drinking water therein and a container disposed in said cap for storing a mixture, characterized in that, said cap has a shape in which a small diameter cylindrical part is bonded to the upper side of a large diameter cylindrical part, said container that has a bottom and is cylindrical is disposed so as to project downward in order to store said mixture in said large diameter cylindrical part, a mechanically weak portion is formed at a bottom surface of said container, a pressing rod that is projected upward is disposed near said mechanically weak portion, said container is supported with a pawl portion that is formed while extending from a circumferential side near an upper end of said large diameter cylindrical part of said cap toward the center of said cap, and a locking portion that is formed while extending from a circumferential edge portion toward outside of an upper surface of said container, a pressing cap disposed at an upper surface of said pressing rod is housed in said small diameter cylindrical part and is freely threaded to a threaded part configured in an openable lid disposed while capping said small diameter cylindrical part of said cap, said cap has a projection for guiding in said small diameter cylindrical part, said projection for guiding fitted into a groove part formed on an outer circumferential side of said pressing cap to control the rotation of said pressing cap, and when said openable lid is rotationally moved, said pressing cap is pushed downward, said pressing rod of said container is pressed down to break said mechanically weak portion of said bottom surface and open, and said mixture in said container is dropped into said drinking water.