the space 25 defined by the closure member 21 and out through the conical air discharge orifice 26 liquid moves up through the tube 27 under the urging of this same air pressure and moves through the nozzle unit 28 having the cylindrical lower extension 29 received in a press fit relationship in the central opening in the plate 22 preferably the tube 27 is adhesively secured to the inside diameter of the extension 29 a conical upper end 30 of the nozzle unit 28 is generally similar on its exterior surface to the conical surface of the air orifice 26 and the space between them provides a passage for the discharge of the pressurized air directed generally toward the axis of the device to assist in the atomization of the liquid discharged through the orifice 31 the plate 22 is capable of a resilient deformation under the axial pressure provided by the cap 32 as it is tightened down in its threaded engagement with the closure member 21 the deflected condition of the plate 22 acting as a diaphragm is shown in fig1 the resulting resilient pressure forms a seal across the liquid discharge orifice 31 as the cap first engages the outer surface 33 of the nozzle element 28 with the continued tightening of the cap 32 the deflection of the plate 22 continues until the underside of the cap 32 bears also against the end surface 34 of the closure member 21 to seal off the air discharge orifice 26 under these conditions the container is obviously fully sealed as the cap is subsequently unscrewed to prepare the dispenser for use the resilient of the plate 22 restores it to.