include dual ovenable food trays or cold storage food trays both in the base container and in the lidding whether a thermoformed lid or a film where the freshness of the food contents can decay with the ingress of oxygen the compositions can also be used in the manufacture of cosmetic containers and containers for pharmaceuticals or medical devices other suitable articles include rigid or semi rigid articles including plastic such as those utilized for juices soft drinks as well as thermoformed trays or cup normally having thickness in the range of from 100 to 1000 micrometers the walls of such articles can comprise single or multiple layers of materials the article can also take the form of a bottle or can or a crown cap crown or cap liner plastisol or gasket the composition of the present invention can be used as an integral layer or portion of or as an external or internal coating or liner of the formed semi rigid or rigid packaging article as a liner the composition can be extruded as a film along with the rigid article itself e g by coextrusion extrusion coating or an extrusion lamination process so as to form the liner in situ during article production or alternatively can be adhered by heat and or pressure by adhesive or by any other suitable method when the compositions are used in a wall or as a layer of a wall the permeability of the composition for oxygen is advantageously not more than about 3 0 or about 1 7 or about 0 7 or about 0 2 or about 0 03 cm 3 mm m 2.