Abstract: Containers of the present invention are particularly adapted for use in heating a food product contained therein by utilizing an oven that operates with forced heated air. In one embodiment of the present invention, the container includes a body portion having a bottom end panel attached thereto, and a top end panel releasably attached thereto. The container is provided with means for allowing heated air to pass through the container such as a plurality of apertures in the container's top and bottom end panels, or a plurality of apertures in the container's sidewall panel. In one embodiment, the body portion of the container is provided with a pleat that is initially folded. When the container's top end panel is removed, the pleat is unfolded to allow the container to be expanded. In another particularly preferred embodiment of the present invention, the body portion of the container is provided with a line of weakness that is broken to open the container.