A plastic container comprising: an upper portion having a mouth defining an opening into said container, a neck extending from said upper portion, a body portion extending from said neck to a base, said base closing off an end of said container; said upper portion, said neck, said body portion and said base cooperating to define a receptacle chamber within said container into which product can be filled; said base including a chime extending from said body portion to a contact ring which defines a surface upon which said container is supported, said base further including a central portion defined in at least part by a pushup having a generally truncated cone shape in cross section located on a longitudinal axis of said container, and an inversion ring having a generally skewed S shaped geometry in cross section, and circumscribing said pushup; said truncated cone having an overall general diameter that is at most 30% of an overall general diameter of said base and a top surface generally parallel to a support surface, wherein, in the initially formed state, said inversion ring has an upper and radially outer portion and a lower and radially inner portion, wherein said inversion ring upper and radially outer portion includes in part an externally concave curve in cross section having a first radius, wherein said,inversion ring lower and radially inner portion includes in part a second, externally convex curve in cross section having a second radius, said first radius having a value that is at most 35% of a value of said second radius, whereby the first and second radii (76, 78) of the inversion ring form the generally skewed S geometry, characterized in that a hinge means is formed on said inversion ring, wherein said hinge means is configured as a plurality of grooves and includes a plurality of grooves formed in said inversion ring, wherein said plurality of grooves are located between an upper portion and a lower portion of the inversion ring, and said plurality of grooves generally completely surround and circumscribe the central pushup. an upper portion having a mouth defining an opening into said container, a neck extending from said upper portion, a body portion extending from said neck to a base, said base closing off an end of said container; said upper portion, said neck, said body portion and said base cooperating to define a receptacle chamber within said container into which product can be filled; said base including a chime extending from said body portion to a contact ring which defines a surface upon which said container is supported, said base further including a central portion defined in at least part by a pushup having a generally truncated cone shape in cross section located on a longitudinal axis of said container, and an inversion ring having a generally skewed S shaped geometry in cross section, and circumscribing said pushup; said truncated cone having an overall general diameter that is at most 30% of an overall general diameter of said base and a top surface generally parallel to a support surface, wherein, in the initially formed state, said inversion ring has an upper and radially outer portion and a lower and radially inner portion, wherein said inversion ring upper and radially outer portion includes in part an externally concave curve in cross section having a first radius, wherein said,inversion ring lower and radially inner portion includes in part a second, externally convex curve in cross section having a second radius, said first radius having a value that is at most 35% of a value of said second radius, whereby the first and second radii (76, 78) of the inversion ring form the generally skewed S geometry, characterized in that a hinge means is formed on said inversion ring, wherein said hinge means is configured as a plurality of grooves and includes a plurality of grooves formed in said inversion ring, wherein said plurality of grooves are located between an upper portion and a lower portion of the inversion ring, and said plurality of grooves generally completely surround and circumscribe the central pushup.