| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve decompression absorption performance in a bottle. <P>SOLUTION: A bottle 1 is provided, in which a bottom wall portion 19 at the bottom 14 comprises: a ground contact portion 18; a rising peripheral wall portion 21 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 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 extending upward from the inner end portion of the movable wall portion in the bottle radial direction. The movable wall portion is disposed so as to flexibly move around the portion 25 connecting the rising peripheral wall portion with itself so that the depressed peripheral wall portion is moved upward. The rising peripheral wall portion is formed with a plurality of vertical ribs 30 depressed toward the bottle radial inner side and opened toward the upper side along the bottle peripheral direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
