Abstract: A cup shaped cover and valve assembly is provided for a drinking receptacle to close off the open top of the receptacle to prevent spilling or splashing of either hot or cold beverages in the receptacle. The cover includes a plate surrounded by a rim, the plate being slightly tilted in the rim so that its top surface slopes between diametrically opposite points on the rim. An elongated opening is provided in the plate adjacent to its lowest level portion and a valve head in turn positioned beneath the plate to close the opening. The valve head is biased against the opening by resilient integral supporting arms secured to the bottom of the plate.