Container and base with deflectable dome

A container made of polymeric material, comprising:

• a top portion defining a mouth;
• a sidewall portion coupled to the top portion;
• and
• a base coupled to the sidewall portion opposite the top portion, the base including
• a support surface having an outer perimeter defining a first dimension along a major axis and a second dimension along a minor axis disposed at an angle to the major axis,
• an inner wall coupled to the support surface opposite the outer perimeter, and
• a dome projecting upwardly from the inner wall and having an initial depth with respect to the support surface, the initial depth of the dome is between approximately 8 percent to approximately 15 percent of the first dimension, the dome is defined by a major radius of curvature along the major axis and a minor radius of curvature along the minor axis, wherein the dome is deflectable in response to a differential pressure across the base without permanent deformation of the base.