Patent ID: 8887937

Claim:
A two piece closure for use with a container and comprising a resilient liner: a lower portion having a sealing shoulder for pushing the resilient liner against a mouth of the container to effect a seal over the mouth, said lower portion having an opening on an upper end, and a crossbar spanning the opening; an upper solid portion for covering said opening; said resilient liner being in a plane over said mouth; said cross bar being spaced from said plane over said resilient liner, so that upon expansion of said resilient liner upward, the crossbar limits travel of the expanding resilient liner while maintaining access to the resilient liner, and maintaining the seal; said lower portion having a upper circumferential wall; an upper retaining outcropping along the upper circumferential wall; said upper retaining outcropping having at least one break along the upper circumferential wall; said upper solid portion having a peripheral downward extending wall that engages said lower portion along said upper retaining outcropping of said upper circumferential wall, leaving a gap above the plane of said resilient liner and extending outside said peripheral downward extending wall, said upper solid portion enclosing a space above the resilient liner; and said gap providing a channel from said space to outside the two piece closure.