Polyamides and polyesters blended with a lithium salt interfacial tension reducing agent

A bottle comprising a layer with a stretched region, wherein the layer is comprised of a polyamide comprising at least one reaction product selected from the group consisting of the reaction of amino caproic acid with itself, and the reaction product of A-D where A is a residue of dicarboxylic acid comprising adipic acid, isophthalic acid, terephthalic acid, 1,4 cyclohexanedicarboxylic acid, resorcinol dicarboxylic acid, or naphthalenedicarboxylic acid, or a mixture thereof, and D is a residue of a diamine comprising m-xylylene diamine, p-xylylene diamine, hexamethylene diamine, ethylene diamine, or 1,4 cyclohexanedimethylamine, or a mixture thereof, dispersed into a crystallizable polyester with at least 85% of the polyester acid units derived from terephthalic acid or the dimethyl ester of terephthalic acid, an interfacial tension reducing agent

• wherein the interfacial tension reducing agent is lithium sulfobenzoate and wherein the stretch ratio of the polyamide domains divided by the stretch ratio of the crystallizable polyester in the same direction is less than 75% and the wall is void of a cobalt compound.