A meal tray assembly for being carried by an aft-facing side of a seat back for use by a person seated aft of the seat back is provided. The assembly includes a tray mountable to the seat back and including a first shell having a forward facing surface when in the stowed position and a second shell for mating with the first shell and having a rearward facing surface towards the aft-seated person when in the stowed position. A major recess is defined in the rearward facing surface of the second shell and an inwardly facing elongate flanged is carried by the rearward facing surface of the second shell and extending towards the major recess. A flexible screen is provided for being positioned in the recess by an interference fit between the inwardly facing flange and an engaging surface of the major recess.