A sliding lid for a food container which has first and second flanged edge portions on opposing sides of its opening. The sliding lid includes a main lid panel with first and second flange-receiving channels configured to slidably receive the flanged edge portions of the food container from an open position, in which the opening of the container is uncovered, to a closed position, in which the main lid panel covers the opening of the container. The first and second flange-receiving channels are configured to retain the lid on the container. The sliding lid may include a backstop provided between the two flange-receiving channels and configured to restrict further sliding of the lid beyond the closed position. The sliding lid may include a front flap which can be sealed onto the container to further restrict sliding of the lid.