Snap on closure and method

In combination a container lid having a closure receiving opening therein, said opening surrounded by an upstanding neck terminating in a circumferentially enlarged retaining lip, an annular upstanding locking collar surrounding said neck radially spaced therefrom, a dispensing closure seated on said upstanding neck having a circumferential sealing channel, said channel having a substantially cylindrical inner wall extending within said neck, a top wall bearing against said retaining lip and an outer wall radially compressed between said locking collar and said upstanding neck.

An all plastic dispensing closure comprising a pouring opening, a closure member engaging said opening, an annular sealing channel surrounding said opening, said channel having a substantially cylindrical inner wall, an annular top wall and a circumferential outer wall, said outer wall having a lower radially inwardly formed sealing bead terminating in a lower extremity, an inner cam surface at said sealing bead lower extremity, an outer cam surface at the outer wall lower extremity and a load bearing shelf surrounding said sealing channel.

An all plastic dispensing closure adapted for sealing engagement to an upstanding container opening neck terminating in a circumferential enlarged retaining lip having a first outside diameter, an upstanding collar surrounding the lower portion of said neck and radially spaced therefrom having a second inside diameter, said closure comprising a dispensing opening surrounded by a circumferential outer wall, said outer wall having an internal diameter less than said first outside diameter and an outside diameter at least as great as said second inside diameter.