Polyester/polyamide blend having improved flavor retaining property and clarity

A polyester polymer composition comprising

• (A) a polyester polymer comprising:
• (i) a polycarboxylic acid component comprising at least 60 mole % of the residues of terephthalic acid, derivates of terephthalic acid, naphthalene-2,6-dicarboxylic acid, derivatives of naphthalene-2,6-dicarboxylic acid, or mixtures thereof, and
• (ii) a polyhydroxyl component comprising at least 30 mole % of the residues of C2-C4 aliphatic saturated diols,
• based on 100 mole percent of the polycarboxylic acid compound residues and 100 mole percent polyhydroxyl compound residues in the polyester polymer, respectively;
• (B) a polyamide polymer obtained from a reactant containing an allylic hydrogen atom, wherein the polyamide polymer is in an amount ranging from 0.10% wt. % to 10.0 wt. %, based on the weight of (A) and (B), having a C:A terminal group concentration ratio of 2:1 or more and a C+A terminal group concentration of at least 0.17 meq/g of polyamide polymer, wherein C represents a cumulative total of a terminal carboxyl group concentration and a terminal hydrocarbyl group concentration expressed in meq/g of polyamide, and A represents a terminal amine group concentration expressed in meq/g of polyamide;
• and
• (C) an oxygen scavenging transition metal catalyst.