Abstract: A closure system for a container includes a pair of primary anchors located opposite one another on an exterior surface of the neck. Each primary anchor has vertical and horizontal portions. A cap has an upper surface and a series of walls depending downwardly therefrom and at least first and second locking tabs extending downwardly from an underside of the cap. The locking tabs are located opposite one another, and there is at least one rib between the walls of the cap and the locking tabs. Each of the locking tabs has an inwardly extending anchor tab on an inside surface thereof the locking tab. The anchor tabs are arranged to engage the primary anchors when the cap is engaged with the neck and turned relative to the container. The vertical portions of the primary anchors are arranged to positively stop further rotation of the cap relative to the container.

Abstract: A closure system for a container includes a pair of primary anchors located opposite one another on an exterior surface of the neck. Each primary anchor has vertical and horizontal portions. A cap has an upper surface and a series of walls depending downwardly therefrom and at least first and second locking tabs extending downwardly from an underside of the cap. The locking tabs are located opposite one another, and there is at least one rib between the walls of the cap and the locking tabs. Each of the locking tabs has an inwardly extending anchor tab on an inside surface thereof the locking tab. The anchor tabs are arranged to engage the primary anchors when the cap is engaged with the neck and turned relative to the container. The vertical portions of the primary anchors are arranged to positively stop further rotation of the cap relative to the container.