Synthetic resin container having inverted, folded back bottom wall

A synthetic resin container having a bottom wall for forming a bottom portion of the container, and a body portion connecting integrally with an outer periphery of the bottom wall to define a space for filling a content therein, the bottom wall being inverted and folded back toward the inside of the body portion to form a raised bottom, wherein

• the body portion has a lower peripheral wall for forming a self-standing foot by inverting and folding back the bottom wall to bring the lower peripheral wall into contact with or place the lower peripheral wall in proximity to an outer-side wall portion of the bottom wall;
• a bending groove is provided at a boundary between the bottom wall and the body portion before inverting and folding back the bottom wall to serve as a starting point for inverting and folding back the bottom wall, the bending groove being protruded outwardly from the bottom portion and defining an annular hollow portion therein after inverting and folding back the bottom wall;
• the body portion has a narrowed portion formed around the entire circumference of a lower peripheral wall of the body portion so as to protrude toward the inside of the body portion before inverting and folding back the bottom wall;
• the bottom wall before inverting and folding back the bottom wall has an annular rib protruding to the inside of the body portion and brought into contact with the inner surface of a lower peripheral wall of the narrowed portion to form a seal portion between the narrowed portion and the annular rib after inverting and folding back the bottom wall;
• the bottom wall is formed by a slanting wall in which an edge portion is at the highest position and a liquid pool is formed at a center region thereof after inverting and folding back the bottom wall;
• and
• the annular hollow portion has a diameter larger than a diameter of the body portion after inverting and folding back the bottom wall.