Patent ID: 7748550

Claim:
A double cap for use with a container, said container having a neck and an opening leading into the container, said double cap comprising: a lower cap having an insertion pipe body, said insertion pipe body defining an adjunct receiving chamber therein, said insertion pipe body having a bottom opening, a bottom cover covering the bottom opening of the insertion pipe body; an upper cap rotatably connected to the lower cap; a push member disposed in the adjunct receiving chamber of the lower cap; the upper cap engaged to the push member in a manner so that rotation of the upper cap in a predetermined direction pushes the push member downward to cause at least a portion of the bottom cover to be removed from the bottom of the insertion pipe body to expose said bottom opening; further comprising: a plurality of rib protrusions provided on an inner surface of the insertion pipe body; a plurality of guide protrusions provided on an outer surface of the push member, and, wherein the rib protrusions and guide protrusions are formed and positioned to guide the upward and downward movement of the push member.