disclosed is a container especially adapted for use in storing and heating comestibles intended for final preparation in microwave ovens . the container comprises a molded pulp tray , having a plastic film , preferably a polyester , adhered to its product - contacting surfaces . the container exhibits high strength and excellent product protection , but yet is low in cost . the process for making the container takes advantage of the porous nature of the pulp tray by drawing a vacuum directly through the tray to draw a film of heated plastic into adhering contact . the film is preferably extruded as the tray , carried in a vacuum mold , passes directly under the extruder .