Lid for beverage containers

A lid for a beverage container comprising:

• a lower lid having a perimeter skirt adapted to secure the lower lid to an opening of the beverage container, a lip portion radially inward from the skirt and extending upward from the skirt and defining an inside surface, an annular portion radially inward from the lip portion and defining a plurality of openings through which liquid from the container may flow;
• an upper horizontal lid resting on the lower lid by gravity and having a perimeter edge that is sized to closely conform with the inside surface, the upper lid covering the annular portion as it rests on the lower lid;
• a stop mechanism cooperating with the lower lid and the upper lid to limit the range of motion of the upper lid with respect to the lower lid, wherein the stop mechanism enables the upper lid to move away for a distance from the lower lid in response to pressure exerted upon the upper lid by liquid flowing out of the container through the openings as the container is tilted, and wherein the stop mechanism prevents the upper lid from being expelled from the lower lid, and wherein the upper lid returns to resting on the lower lid by gravity as the container is returned to vertical;
• the annular portion comprises a trough in which the openings are defined;
• and
• wherein the stop mechanism comprises one or more stop members protruding from the inside surface of the lip portion to interfere with the upper lid to limit the movement thereof, the one or more stop members being located above a plane of the central wall by a distance to enable sufficient upward movement of the upper lid to allow a flow of liquid out of the container between the inside surface and the perimeter edge of the upper lid.