Patent ID: 6942114

Claim:
A cap for a container with an opening and an extraction controlling projection, comprising: a cap main portion to be screwed in the container to close the opening of the container and having a hollow shape with a closed upper end and an open lower end, said cap main portion having a plurality of window holes disposed along a periphery at a lower side thereof and a thick wall portion formed below the window holes and having a smooth outer surface and grooves at an inner side thereof, and a ring member disposed inside and closely fitted with the cap main portion so that the ring member fitted in the cap main portion can be seen through the window holes, said ring member having engaging pieces formed on an inner periphery thereof for hooking on the extraction controlling projection of the container, and a plurality of fin members at an outer periphery thereof to project upwardly, said fin members being located in the grooves of the thick wall portion so that the ring member is detachably integrated with the cap main portion.