a container lid includes a conventional main or pour opening and a vent opening spaced from the main opening . a vent score defines the shape of the vent opening , and a vent panel covers the vent opening . the vent panel has a raised convex shape . the lower surface of the tab handle includes a protruding portion , seen as a concave shaped element when viewed from above the container lid . the protruding portion of the tab handle can be aligned with the vent panel so application of a downward force on the tab handle transfers force to the vent panel and breaks the vent score . the shapes of the vent panel and concave element of the tab handle can be adjusted for selective and controlled force transfer to create the vent opening .