A vehicle cupholder comprises a generally planar support member that is pivotable about a horizontal axis between a horizontal open position and a vertical stowed position. The support member includes a first curved wall and a first retaining arm retaining a container when in a horizontal open position. A first retaining arm is pivotally mounted to the support member in a plane parallel to the plane of the support member. A first mounting bracket includes a cam-shaped outer perimeter surface in constant contact with first retaining arm. The retaining arm is slideable along the outer perimeter surface between the extended position and the retracted position. The outer perimeter surface exerts a biasing force on the first retaining arm as the support member is pivoted from the horizontal open position to the vertical stowed position so as to pivot the first retaining arm from the extended position to the retracted position.