PROBLEM TO BE SOLVED: To reduce deformation of a bottom shape when a bottle is taken out from a metal molding at a high temperature and allow the container to be formed with a good yield without interference with the metal molding by forming a second arch on a first arch ridge formed on a bottle bottom. ;SOLUTION: In a bottle bottom shape with a first arch 1 formed to bend inward in a bottle at a center angle α, a second arch 2 with a center angle βis formed on a ridge of the arch 1 on a parting line. The center angle αis 20°≤α≤60°, while the center angle β is preferably 10°≤β≤60°. In addition, the second arch 2 may be formed on a ridge of the first arch perpendicular to the parting line. Thus in designing a metal molding in consideration in advance to deformation caused after take-out at a high temperature, it can be designed within a range free from removal flaws, breakage or the like by the metal molding.;COPYRIGHT: (C)1999,JPO
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