Patent ID: 7048137

Claim:
A closure for a bottle, comprising: an end wall having a peripheral edge and an interior side; at least one sidewall extending generally perpendicularly from said end wall and circumscribing said peripheral edge; a seal ring formed on said interior side of said end wall; a lobe formed on said end wall and extending in a direction opposite said sidewall and generally perpendicular to said end wall; and an aperture through said lobe; said closure formed from at least two polymeric materials, whereby said first polymeric material forms a core of the closure, wherein said core is formed with a number of ribs and intervening voids to provide the closure with areas of varying thickness, and wherein said core forms said seal ring; and said second polymeric material layers over at least a portion of said first polymeric material and fills in said voids in said core, wherein said first polymeric material has a durometer greater than said second polymeric material.