Patent ID: 8827097

Claim:
An overcap for a container having a container body defining an interior storage volume and an access opening into the interior storage volume, the access opening including an upstanding rim and means for releasably retaining the overcap thereon, the overcap comprising: a body portion formed to cover the access opening of the container, the body portion having an upper surface, a bottom surface and an outer periphery, the bottom surface adjacent the outer periphery forming an overlapping portion for extending across the upstanding rim of the container, wherein the overlapping portion when in a rest position is in continuous contact with the upstanding rim of the container; a skirt depending from the bottom surface adjacent the outer periphery of the body portion, the skirt dimensioned to cover the upstanding rim of the container when the bottom surface of the overlapping portion overlaps the upstanding rim of the container and the body portion covers the access opening of the container, a plurality of radially extending lugs formed on the upper surface of the overlapping portion, the lugs extending radially across the overlapping portion and extending from the upper surface in a direction opposite of the depending skirt, the plurality of lugs positioned at spaced intervals around the outer periphery, the lugs positioned for radially extending across the upstanding rim of the container, and a plurality of flexure portions formed within the overlapping portion, the flexure portions located in the spaced intervals between the radially extending lugs, wherein the flexure portions flex into an active position and are out of continuous contact with the upstanding rim of the container creating a flow path between the overlapping portion and the upstanding rim when the pressure inside of the overcap is greater than the pressure outside of the container.