applicant has developed a novel lid assembly . according to at least one embodiment of the invention , a lid for use in conjunction with a beverage container comprises : a plastic molding of circular footprint with a first inverted u - channel feature at its perimeter which engages the lip of a container . the outermost wall of the channel incorporates a plurality of molded , rolled , or similarly created , inwardly facing latch features at its boundary that engage reentrant detailing on the underside of the container &# 39 ; s lip . the lid is detached from the container by the purposeful disengagement of said latch details from the lid .