A closure for a container includes a base with at least one opening for dispensing a material from the container and a cover coupled atop the base. The cover includes at least one flap that is movable between an open position for dispensing the material and a closed position for covering the opening. At least one projection extends from the flap to releasably retain the flap in the closed position. A tab extends from the projection. A guide surface is provided on the tab and is configured to contact an edge of the opening when the flap is moved toward the closed position and is configured to create a wedging interaction with the edge of the opening when the flap is moved further toward the closed position. The flap is retained in the closed position by the wedging interaction of the tab and the edge.