Decompression absorption bottle

A decompression absorption bottle which is formed of a synthetic resin material and has a cylindrical shape, the bottle comprising:

• a bottom part,
• wherein a bottom wall part of the bottom part includes:
• a ground contact part located on an outer peripheral edge portion;
• an upright peripheral wall part which is continued to the ground contact part from an inside in a radial direction of the bottle and extends upward;
• and
• an annular movable wall part which extends inward in the radial direction of the bottle from an upper end portion of the upright peripheral wall part,
• wherein the movable wall part is disposed to be freely rotatable in a vertical direction around a connecting portion with the upright peripheral wall part,
• the movable wall part is provided with an annular recess which is recessed upward and extends in a circumferential direction of the bottle, and
• the annular recess is configured that an inner corner part having a V-shape or a U-shape protruding inward in the radial direction of the bottle when viewed from below, and an outer corner part having a V-shape or U-shape protruding outward in the radial direction of the bottle are alternately continued to each other in the circumferential direction of the bottle.