Patent ID: 7963419

Claim:
A container lid for use on a container having at least one at least partially circumferential protrusion, the comprising: a top portion having a side portion extending downward with respect to the top portion along the perimeter of the top portion; a first circumferential rib protruding from the underside of the top lid portion wherein the first circumferential rib and the side portion of the lip top portion form a U-shaped channel; a first seal created by the first circumferential rib position such that when the lid is placed on the container the first circumferential rib is forced against an interior wall of the container, and wherein the first circumferential rib transitions to a larger diameter, such that the seal created increases in strength as the lid moves further into the container; a second seal including a second circumferential rib and a third circumferential rib, each extending from the underside of the top lid portion such that when the lid is placed on the container the second rib is deflected by and contacts the third rib but not the container and the third rib is deflected by and contacts the container, the second and third ribs combining to create a single seal wherein the second rib is positioned to exert a spring-like force against the third rib countering the force exerting by the container on the third rib, thereby increasing the strength of the seal between the third rib and the container; wherein when the lid is in place on the container, the side portion of the lid top portion stretches over a curved lip of the container and contacts the lip, thereby creating an interference seal as a third seal and when the lid positioned on a container having tapered sidwalls, the force exerted by the first circumferential rib on the interior wall of the container is directed outwardly, thereby strengthening the third seal; and a hook on the side portion facing the container and configured such that when the lid is put in place on the container the hook latches onto one of the at least one circumferential protrusions on the container, thereby securing the lid to the container without threaded engagement: and wherein the combination of seals forms a liquid tight seal without use of a gasket.