Patent ID: 7051890

Claim:
A biaxially drawn, blow-molded bottle made of a synthetic resin, comprising at least two groove-like ribs cut circumferentially into a body of said bottle, with an uppermost circumferential rib being disposed at an upper end of the body near a border with a shoulder in a roughly truncated conical shape, and a lowermost circumferential rib being disposed in a lower portion of the body, wherein a distance H between two adjacent ribs is set at a length in a range of 0.2D to 0.6D where D indicates a diameter of a cylindrical body or a length of a diagonal line of a body having a regular polygonal shape, and wherein plane rigidity of a body wall is set in such a manner that a part of said body wall cannot be sunken inward at a reduced inner pressure of at least 350 mmHg (46.7 kPa).