Lightweight container base

A container defining a longitudinal axis and a transverse direction that is transverse with respect to the longitudinal axis, the container comprising:

• a finish;
• a sidewall portion extending from the finish;
• a plurality of ribs defined by the sidewall portion;
• a base portion extending from the sidewall portion and enclosing the sidewall portion to form a volume therein for retaining a commodity, the base portion having a plurality of footed contact surfaces for supporting the container;
• and
• a plurality of straps extending radially along the base portion away from the longitudinal axis in the transverse direction, each one of the straps defining a strap surface that is closer to the finish than the plurality of footed contact surfaces;
• wherein:
• the plurality of ribs and the base portion are configured to cause the container to cross over from a vacuum phase to a phase of hydraulic charge-up when top load is applied to the container after the container is filled and closed with a closure coupled to the finish;
• the container is made of a polymeric material;
• the base portion includes a central pushup portion at an axial center thereof, the longitudinal axis extends through the central pushup portion;
• an outward strap radius defined by the base portion as-blown decreases when the container is subject to volume displacement post-fill causing increased vacuum;
• an inward foot radius defined by the base portion as-blown increases when the container is subject to volume displacement post-fill causing increased vacuum, the inward foot radius is inward relative to the plurality of footed contact surfaces of the container and is along a curved side surface between the plurality of footed contact surfaces and the central pushup portion;
• a standing base radius defined by the base portion as-blown decreases when the container is subject to volume displacement post-fill causing increased vacuum;
• and
• a total projected area of the plurality of footed contact surfaces as-blown is at least twice the size of a total projected area of the plurality of straps.