Abstract: There is provided an improvement in a molded plastic container lid for sealing an open top container including a peripheral wall having an inner surface, a top edge and provided with an outwardly projecting, peripheral sealing bead with a downwardly facing portion. This type of lid includes a circumferentially extending bead engaging means including first means for engaging the inner surface of the peripheral wall and a second means for engaging the bead. The second means includes an inwardly extending ledge means having an upwardly facing surface for engaging the downwardly facing portion of the bead. This improvement comprises providing the upwardly facing surface of the inwardly extending ledge means as a horizontal surface.