A cover assembly is capable of attaching to a container and has a dispensing orifice and a substantially perpendicular button opening on a side with a button. A single piece valve beam formed of a deflectable material has the actuator button located on one end and a fulcrum located on another end opposite the actuator button. An inner region of the cover has a retention surface opposite the button accommodating the fulcrum. The single piece valve beam is held inside the inner region of the cover between the button opening and the retention surface by deflection of the beam and rotation about the fulcrum such that the sealing surface moves away from the dispensing orifice when the actuator button is pressed. The deflectable material of the single piece valve beam acts as a spring that exerts force on the sealing surface and exerts force on the actuator against the button opening. The single piece valve beam can be configured to move away from the dispensing orifice when the button is pressed. An integral arm can be alternately cantilevered off of the single piece valve beam so the arm rotates in a same direction as the single piece valve beam rotates at the fulcrum. The arm can be alternatively cantilevered from a stem location so the arm rotates in a direction opposite a direction to which the single piece valve beam rotates at the fulcrum.