| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a container capable of varying an internal capacity at a low cost without increasing the temperature of the container itself more than necessary even if hot water is poured.SOLUTION: A plurality of slits 25 opening to an outer peripheral side are formed on a flange part 23 of an upper end part of a peripheral wall 22 of a lower side cylindrical part 2 in the whole area in a circumferential direction, and a plurality of ribs 32 are formed at the entire area in the circumferential direction of a movable cylindrical part 3, the plurality of ribs projecting from an inner wall of the movable cylindrical part 3 toward an outer peripheral surface of the lower side cylindrical part 2 in a vertical direction, respectively fitting to the slits 25 due to the vertical movement of the movable cylindrical part 3 to form a gap between the inner wall of the movable cylindrical part 3 and a bag body 4.</p> |
