Bottle

A bottomed tubular bottle comprising:

• an annular groove which is formed so as to be circumferentially and radially recessed inward along the outer peripheral surface of a body of the bottle with a bottle axis as a center and which contracts and deforms the body in the axial direction of the bottle axis when the internal pressure is reduced,
• wherein the annular groove is recessed and formed by a first wall surface arranged on a mouth side of the bottle and a second wall surface arranged on a bottom side of the bottle,
• the body is formed so that the outer diameter on the bottom side is larger than the outer diameter on the mouth side with the annular groove interposed therebetween,
• in a state where the body is not contracted and deformed, the first wall surface is formed in the shape of a plane toward the bottle axis from the outer peripheral surface of the body,
• the second wall surface is formed in the shape of a curved surface curved toward the outer peripheral surface of the body from the bottle axis, and
• the second wall surface gradually changes in orientation so as to become parallel to the bottle axis as the second wall surface approaches the bottle axis which is connected to the first wall surface.