Patent ID: 7556164

Claim:
A synthetic resin thin-walled bottle container comprising: a mouth portion for filling or discharging contents; a body portion extending from the mouth portion; and a heel portion provided at a bottom part of the body portion, for placing therein the body portion in a self-supporting manner, the heel portion comprising: a sidewall having a curved surface that is recessed toward the inside of the container; a bottom face region formed of a curved surface that is smoothly continuous with the curved surface of the sidewall and bulged toward the outside of the container; a bottom-up region formed of a curved surface recessed inwardly toward the vicinity of the center axis of the bottle; and a rising region between the bottom face region and the bottom-up region, for continuously and smoothly connecting the curved surface of the bottom face region and the curved surface of the bottom-up region to each other; wherein the bottom face region and the rising region are bulged toward the underside of the container when the container is filled with the contents, and the bottom face region and the rising region form a flat surface that is closely contacted with a supporting surface of the container.