Patent ID: 6991128

Claim:
A lid for covering a drinking cup containing a liquid, comprising: a top wall having a generally circular periphery; an annular sidewall downwardly depending from the top wall periphery; the lid including a drinking opening formed adjacent to the periphery; and a regulator valve formed under the drinking opening, the regulator valve including: a first sidewall structure downwardly depending from the lid adjacent the drinking opening and terminating in a first bottom wall; and a first aperture formed in the first sidewall structure or the first bottom wall, wherein the first aperture includes at least one of a generally taper shaped portion and an irregularly shaped edge; a second opening formed in the first bottom wall; a second sidewall structure downwardly depending from the first bottom wall adjacent to the second opening and terminating in a second bottom wall; and a second aperture formed in the second bottom wall or the second sidewall structure, the second aperture including at least one of a second generally taper shaped portion and a second irregularly shaped edge.