A container bottom and container cover both have horizontally moving asymmetrical accordion pleats. The container and cover expands and contracts horizontally to adjust the size of the container the container opening. The cover correspondingly adjusts to fit the container opening to allow for different shapes, sizes, and volumes of food or other matter stored therein. Each accordion pleat has a pair of accordion walls hinged together of two different widths. Upon compression of the container and cover each accordion pleat collapses separately by a larger width wall forcing the narrower width wall to bend back behind an adjacent accordion wall.