PURPOSE: To prevent the separation of a lid from a container and the contamination of the container and the hands, by providing a trunpet-shaped pouring lip at an opening of a cap body with a slit, a receiver surrounded by a cylindrical projection from the outer periphery of the top surface thereof, a locking step formed on the inner periphery of a cylindrical portion of the lid coupled therewith and engageable therewith and a sealing portion for insertion in the opening.

CONSTITUTION: A trumpet-shaped pouring lip 8 is formed surrounding an opening 7 in the top surface 32 of a cap body 3 and provided with a slit 9. A cylindrical projection 10 from the outer periphery of the top surface 32 is engageable with a lid 2 serving as a wall to receive the content dropping from the pouring lip 8 so as to keep it from outflowing. A receiver 11 surrounded by the cylindrical projection 10 is provided with a groove 12 in communication with the opening 7 through the slit 9 so as to bring the dropping content back into the container. A lid 2 is coupled with the cap body 3 by means of a connector 13 and a locking step 14 on the inner periphery of a cylindrical portion 21 and a locking step 101 on the cap body 3 are interengageable. A sealing portion 15 of the inner top surface 22 of the lid is inserted in the opening 7 of the cap body 3.