Patent ID: 8360256

Claim:
A storage and drinking container assembly for pressurised beverages, the container assembly comprising: a drinking vessel comprising: a circumferential sidewall; and an open neck having a circumferential inner surface and lip; and, a lid for sealing the vessel, the lid comprising: a cap comprising: a concave closed top including a vent sealed by a pressure release closure in the form of a frangible peg, an outer skirt having a plurality of fingers for engaging the lip, and an inner circumferential wall extending upward from the concave closed top; and, a retaining ring comprising: an outer skirt to retain the fingers of the cap in contact with the lip, and an inner skirt, wherein at least one of the inner circumferential wall and the inner skirt includes at least cammed surface for cooperating with the other of the inner circumferential wall and the inner skirt so that rotation of the cap with respect to the retaining ring causes the at least one cammed surface to axially move the retaining ring apart from the cap.