Patent ID: 8104632

Claim:
A synthetic resin bottle comprising a body portion connected to a mouth portion via a shoulder portion, and at least one constricted portion provided on the body portion and looping along the circumferential direction, wherein the body portion comprises a front wall and a back wall which face each other, a left sidewall and a right sidewall which face each other, and connecting portions which respectively join the walls; the cross section of the body portion along the circumferential direction has a generally polygonal outer profile; the constricted portion comprises a strip-like portion looping along the entire circumferential direction, a bottom side slope portion connected to the strip-like portion and expanding outward toward the bottom portion, a shoulder side slope portion connected to the strip-like portion and expanding outward toward the shoulder portion, a left lateral groove extending from the left sidewall at least to the connecting portion along the circumferential direction, and a right lateral groove extending from the right sidewall at least to the connecting portion along the circumferential direction and intermittent portions formed by spacing apart adjacent terminal ends of the lateral grooves, and wherein at least one of the strip-like portion and the bottom side slope portion are provided with the lateral grooves.