A sliding door assembly for selectively covering a cup holder or other storage compartment of a vehicle, the sliding door assembly including: a pair of opposed rails adapted to be disposed on opposed sides of an opening of the cup holder or other storage compartment; and a panel door including a plurality of adjacent slats adapted to be disposed between the pair of opposed rails, wherein one or more of the plurality of adjacent slats includes a central body portion with a clamp structure disposed at each end of the central body portion, wherein each of the clamp structures is adapted to grasp one of the pair of opposed rails to translatably secure the panel door to the pair of opposed rails. The sliding door assembly also includes a cover panel adapted to be disposed between the pair of opposed rails.