Abstract: A coupling piece coupling a cap body and a band is prevented from being cut off to tampering and the cutting-off thereof due to deformation of the band. An open/close cap a cap body to be screwed to an outer peripheral surface of a mouth portion of a pouring spout and a band extending in the circumferential direction of the cap body and engaged with the pouring spout, the band being formed with at least one portion at which the band 10 circumferentially separated, the end of the band being connected by a connection piece at that portion at which the band is cut off. The band is disposed below the lower surface of the cap body and coupling pieces are attached to the lower portion of the cap body. A band shape maintaining member is disposed to the lower end of the cap body.

Abstract: A sealing mechanism for container opening comprising: a cylindrical opening disposed on a container body; and a cap for sealing the cylindrical opening, wherein the cap comprises: a cap body having a cylindrical shape for covering a side surface of the cylindrical opening, and provided with a thread portion disposed on an inner surface of the cylindrical shape for engaging with a thread portion disposed on an outer surface of the cylindrical opening, and capable of moving up and down while rotating around the side surface of the cylindrical opening; and an upper lid for covering an opened upper end of the cylindrical opening and sealing the cylindrical opening, wherein the cap body and the upper lid are independent of each other so that the cap body can be rotated without rotating the upper lid, and when the cap body rotates around the side surface of the cylindrical opening to move toward the upper end of the cylindrical opening, the cap body slidably abuts on the upper lid, and pushes up the upper lid to op

Abstract: A ring-like reinforcement part 2 is secured to an upper end face of a bottomed cylindrical container main body 1. The container main body 1 is formed of a flexible film-like member which is composed of polyethylene, polypropylene or the like. The reinforcement part 2 has strength enough to prevent the container main body 1 from greatly deformed and to prevent liquid, such as adhesive agent, coating material or the like stored in the container main body 1 from overflowing when the container main body 1 is lifted up through the reinforcement part 2.