Plastic container having base with annular wall and method of making the same

摘要

A plastic bottle comprises a base having a chime (28), a dome (34) and an annular wall (30) extending between the chime and the dome. The annular wall extends generally parallel to a longitudinal axis of the bottle to support the dome against inverting due to internal pressure and increases the bi-axial stretching of the base during blow molding to strengthen the material of the same.