Drink cup lid

A lid comprising

• a central cover formed to include a liquid-discharge outlet and an upwardly opening plug receiver,
• a brim mount arranged to surround the central cover and adapted to mate with the brim of a cup and cooperate with the central cover to close a mouth opening into an interior region formed in the cup and place the liquid-discharge outlet in fluid communication with the interior region of the cup, and
• an outlet closure including a hinge coupled to the central cover, a closure plate appended to the hinge for movement relative to the central cover between a closed position closing the liquid-discharge outlet and an opened position opening the liquid-discharge outlet, and a plate-retainer plug coupled to the closure plate and arranged to extend upwardly away from a floor of the cup when the lid is mounted on the brim of the cup and the closure plate is in the closed position, wherein the plate-retainer plug is configured to provide retainer means for nesting snugly to establish an interference fit in the upwardly opening plug receiver formed in the central cover to retain the closure plate in the opened position at the option of a consumer so that the consumer can sip a liquid flowing outwardly from the interior region of the cup through the liquid-discharge outlet without allowing flapping motion of the closure plate relative to the central cover as the consumer drinks a liquid expelled from the cup.