Multi-layer barrier for a container

A preform configured to form a container, the preform comprising:

• a finish defining an opening and a top sealing surface configured to contact a closure to seal the opening closed;
• a body portion extending from the finish;
• a bottom portion at an end of the preform opposite to the finish, a longitudinal axis of the preform extends through an axial center of the bottom portion;
• an oxygen barrier layer extending along the body portion to the bottom portion, and across the bottom portion;
• an oxygen scavenger included with the oxygen barrier layer;
• and
• a base layer including an outer portion and an inner portion, the oxygen barrier layer is between the outer portion and the inner portion, the oxygen barrier layer extends along the body portion and the bottom portion;
• wherein:
• the oxygen barrier layer is 8-50% of a total weight of the preform;
• the oxygen barrier layer is tapered such that the oxygen barrier layer is closest to the inner surface at and proximate to the bottom portion, and is furthest from the inner surface and closest to the outer surface furthest from the bottom portion and proximate to the support flange;
• and
• at the body portion of the preform the oxygen barrier layer is confined to an innermost 60% of a total preform wall thickness.