| 摘要 |
<p>The present invention relates to a bottle (1, 101) formed of a synthetic resin material and in a cylindrical shape with a bottom. A bottom wall portion (19, 119) at the bottom of the bottle comprises: a ground contact portion (18, 118) positioned at an outer circumferential edge portion; a rising peripheral wall portion (21, 121) connected to the ground contact portion from the inner side of the bottle radial direction and extending upward; a ring-shaped movable wall portion (22, 122) projecting from the upper end portion of the rising peripheral wall portion toward the inner side of the bottle radial direction; and a depressed peripheral wall portion (23, 123) extending upward from the inner end portion of the movable wall portion in the bottle radial direction. The movable wall portion (22, 122) is disposed so as to flexibly move around the portion connecting the rising peripheral wall portion (21, 121) with itself so that the depressed peripheral wall portion (23, 123) is moved upward. The rising peripheral wall portion (21, 121) has an irregular portion (30, 130) formed all over the circumference.</p> |
