A method of manufacturing a reinforced plastic foam cup including providing a plastic foam cup, positioning a reinforcing member along a first line, moving the cup and the reinforcing member toward an attachment position, at the attachment position, attaching the reinforcing member to the side wall of the cup along the central vertical axis of the reinforcing member, wherein the inner surface of the body of the reinforcing member engages the side wall of the cup at an angle which corresponds with an angle of the side wall of the cup, rotating the cup and the attached reinforcing member in a first direction to attach a trailing portion of the reinforcing member to the side wall of the cup, and rotating the cup and the attached reinforcing member in a second opposite direction to attach a leading portion of the reinforcing member to the side wall of the cup.