Patent ID: 8181819

Claim:
A container lid comprising: a top portion having a side portion extending downward with respect to the top portion along the perimeter of the top portion; a cork seal mechanism having a substantially u-shaped circumferential protrusion extending downward from the lid top portion with the “u” opening facing upward such that when the lid is placed on the container, u-shaped circumferential protrusion is forced against an interior wall of the container; the u-shaped circumferential protrusion having a bead positioned to create a single contact point between the u-shaped circumferential protrusion and the interior wall of the container; a first flexible circumferential rib and a second circumferential rib, each extending from the underside of the top lid portion such that when the lid is placed on the container the first rib is deflected toward and contacts the second rib and the container, wherein the second rib remains substantially non-deflected and does not contact the container when the lid is secured on a container; wherein the first and second ribs combine to create a single seal wherein the second rib limits the flexure of the first rib and creates a force against the first rib countering the force exerting by the container on the first rib, thereby increasing the strength of the seal between the first rib and the container; wherein the first and second ribs are between the u-shaped cork seal mechanism and the lid side portion; wherein when the lid is in place on the container, the side portion of the lid top portion stretches over a curved lip of a top edge of the container and contacts the lip, thereby creating an interference seal as a third seal and when the lid is positioned on a container having tapered sidewalls, a force exerted by the u-shaped circumferential protrusion on the interior wall of the container is directed outwardly, thereby strengthening the third seal; wherein the seal diameter exceeds the diameter of the container at the apex of the lip of the container; and wherein the combination of seals forms a liquid tight seal without use of a gasket and without threaded engagement.