| 摘要 |
PROBLEM TO BE SOLVED: To press an inside plug for a container for refilling into a pouring port of a container so it can be opened with as light a force as possible.SOLUTION: The inside plug comprises:a cylindrical part having an opening end at one end of longitudinal direction; a bottom piece for occluding the other end of the longitudinal direction of the cylindrical part; and a fitting part for fixing the cylindrical part to a mouth of the container for refilling. On an outer edge of the bottom piece, a fragile part which is thinner than an inner part is provided along the cylindrical part. On the bottom piece, a first bulge which projects toward the opening end side over the outer edge and the inner part which is positioned more at the inner position than the outer edge, is provided. |
