Patent ID: 8540112

Claim:
A drinking container comprising: a main body defining an interior cavity that is accessible through an opening at an upper end of the main body, the main body having a rim about the upper end, the rim including an outer surface having an upper portion that is contoured substantially in the form of a curve, and an inner surface defining a recess at least partially around the upper end of the main body, and a first lip projecting toward the interior cavity from the outer surface, wherein the uppermost portion of the first lip is positioned below the uppermost point of the curved upper portion of the outer surface of the rim when the main body is in an upright position; a removable lid configured to enclose the interior cavity, the lid including a spout configured to dispense liquid from the interior cavity, a groove about its perimeter formed to receive the rim of the main body, the groove having an inner surface and an outer surface, and a second lip projecting from the inner surface of the groove into the groove, wherein one of the first lip and the second lip is defined by a variation in thickness between the respective outer surface and inner surface from which the lip projects, and wherein one of the first lip and the second lip is configured to form a seal between the rim and the lid; and a threaded connection between the rim and the lid.