Abstract: A beverage container for accommodating drink cup holders which vary in size. The container has a large diameter upper portion which presents a large capacity and a small diameter lower portion connected with the upper portion by a shoulder. The lower portion fits in a cup holder and has projecting fins which are triangular. The fins extend along the lower cup portion on one side, along the shoulder on another side and may contact the wall of the drink holder on the third side. The fins are flexible and are offset from a radial orientation so that they can contact the drink holder wall with sufficient force to hold the cup in a stable position.