Plastic lid for containers

In a molded plastic container lid for sealing an open top container said 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, said lid comprising a general flat closure wall and a bead engaging means extending circumferentially, said bead engaging means including a first means for engaging said inner surface of said peripheral wall and a second means for engaging said bead, said first means comprising a series of circumferentially spaced abutment members extending downwardly from said closure wall and adapted to engage said inner surface when said lid is secured onto said container, said second means including a circumferentially continuous apron formed integrally along the circumference of said closure wall and carrying an inwardly extending ledge means with an upwardly facing surface extending generally horizontally, said ledge means including a locking portion and said locking portion being interrupted by circumferentially spaced areas and each of said abutment members being generally opposite to and aligned with each of said spaced areas.