| 摘要 |
A bottle that is tubular, is formed of a synthetic resin material, and has a bottom part. A bottom wall part of the bottom part includes a grounding part that is located at an outer circumferential edge thereof, a standing peripheral wall part which is connected from a radial inner side of the bottle to the grounding part and which extends upward, a movable wall part that protrudes, from an upper end of the standing peripheral wall part, toward the radial inner side of the bottle, and a depression peripheral wall part that extends upward from an inner end of the movable wall part in a radial direction of the bottle. The movable wall part is arranged so as to be movable upward centering on a portion connected to the standing peripheral wall part along with the depression peripheral wall part. An upward swelling part which swells upward is formed at an outer end along the radial direction of the bottle of the movable wall part. |
