Abstract: A pop-in tab container lid for sealed association with a container body is disclosed. The lid includes a closure panel having a severable score line which extends about a portion of the panel and terminates in spaced oppositely disposed extremities to define a depressible tab and a tab hinge portion between the extremities. The tab has a short stiffening rib and a long stiffening rib extending between the hinge portion and a segment of the score line which is diametrically opposite the hinge portion. Each rib has an inner end opposing that of the other rib so that the ribs are arranged end to end along a common line. An outer end of the short rib terminates at the segment of the score line and an outer end of the longer rib terminates at the hinge portion.