Abstract: A portable beverage container carrier for an automotive vehicle is formed of a single sheet of flat, stiffened material, such as cardboard, formed with creases to create a rectangular floor, a front, a back and sides. A pair of arms extend laterally from the front and back and are adaptable for insertion into slots in the sides. The arms terminate in hook and loop fabric fasteners which are engageable with mating fabric fasteners on the inside surfaces of the side panels. The front, back and sides can thereby be folded up from the floor panel to form a tray. The front and sides are provided with reinforcement flaps that are foldable inwardly to reinforce the structure of the tray. One of the side flaps is formed with an articulated intermediate panel having apertures therein to receive accessories, such as straws and plastic eating implements. The sheet of stiffened material is formed with a detachable section that can be folded into a dihedral to form an adjustable brace.