Patent ID: 7055715

Claim:
A liquid container comprising a cup including a brim, a floor, and a side wall extending from the brim toward the floor, the side wall including a radially inwardly facing first annular seal surface, the brim including a radially inwardly facing second annular seal surface, an axially upwardly facing third annular seal surface, and a radially outwardly facing fourth annular seal surface, and a lid including a closure and a closure mount ring appended to the closure and coupled to the brim to retain the closure in a position closing a mouth opening into a liquid reservoir chamber formed in the cup, the closure mount ring including a first seal ring arranged to engage the radially inwardly facing first annular seal surface to establish a first liquid flow barrier therebetween, a second seal ring arranged to engage the radially inwardly facing second annular seal surface to establish a second liquid flow barrier therebetween, a third seal ring arranged to engage the axially upwardly facing third annular seal surface to establish a third liquid flow barrier therebetween, and a fourth seal ring arranged to engage the radially outwardly facing fourth annular seal surface to establish a fourth liquid flow barrier therebetween, and wherein the brim includes an inner annular strip located above the side wall of the cup and a frustoconical lid retainer arranged to interconnect the inner annular strip and the side wall of the cup and to converge toward a reference point located in spaced-apart relation to the floor to position the frustoconical lid retainer therebetween to provide an undercut under the inner annular strip and the closure mount ring includes a first lid-removal blocker wall located between the first and second seal ring and arranged to engage the frustoconical lid retainer during movement of the lid in an outer direction away from the floor of the cup to block removal of the lid from the cup, and wherein the closure mount ring further includes a lid-removal flange located below the fourth seal ring and arranged to extend downwardly in an inner direction opposite to the outer direction.