In a finished product used by coupling a 2-piece bottle cap formed of a cover and a body to the opening of a bottle, everything relating to the bottle cap having the body or the cover of various structures in which a desired number of the contents stored in the inner space of the bottle is left remained in a keeping groove when the cover coupled by screw threads to the body is opened after the finished product is turned 90-180 degrees upside down from an upright standing position and then rotated to the upright position, is disclosed.
