The present invention relates to a tethered screw plastic stopper, comprising a tamper shell positioned around the stopper. The tamper shell includes a retaining feature operable to cooperate with a top ring extending outwardly around a bottle neck. The stopper also includes a roof connected to the tamper shell through a hinge and separably connected to the tamper shell through a weakness line, wherein the tamper shell may be moved downwardly in rotation into an opened position.