Abstract: A security ring device to determine whether a container has been opened is integrated with a container and its cover. The security ring device has a rim which abuts the depending edge of the skirt of a container cover. The interior of the skirt has a portion which is provided with a perimeter groove. At least two lugs extend from the rim to the groove to lock the ring to the skirt. At least one lug extends from the rim to the container which has an outwardly extending flange portion positioned so that upon turning the cover to open the container, the at least one lug which extends from the rim to the container and establishes a tension for breaking the ring member. A collar may extend from the rim and abut the outer wall of the skirt. At least one weakened zone may be positioned in the rim ring to facilitate breaking.