Patent ID: 7946443

Claim:
A closure for a container having an upper end and a lip proximate to the upper end, the closure comprising: a top having a first surface and a second surface joined by a frustoconical transition section, the first surface being located above the second surface and defining a substantially planar uppermost portion of the top surrounded by the transition section, the second surface surrounding the first surface and the transition section, the second surface having an outer edge and a substantially planar portion extending radially inwardly from the outer edge to the transition section; at least one vent hole located in the first surface; at least one locking lever including an inwardly projecting locking wedge; an elastically deformable hinge connecting the locking lever to the top, the hinge permitting pivotal movement of the locking lever between a latched position and an unlatched position; and a skirt connected to the top and having an upper edge and a lower edge, the upper edge being located above the lower edge, the outer edge of the second surface being connected to the skirt, wherein the locking wedge is adapted to releasably engage the container lip in the latched position and disengage the container lip in the unlatched position; wherein the first surface is positioned at or below the upper edge of the skirt and above the lower edge of the skirt; wherein the second surface has a width in the radial direction at least as large as a width of the transition section in the radial direction such that the transition section is spaced inwardly from the outer edge; and wherein an annular ring depends from the bottom of the second surface at or near the outer edge and spaced apart from the skirt.