Child-resistant and tamper-evident screw closure

A child-resistant screw closure for a container, such as a toothpaste tube, comprises a cap portion 40 and a flexible security ring 48, the cap being adapted for screw-threaded engagement with the container 10 and the ring being frangibly attached to the cap, the cap and ring having mutually engageable formations 56, 58 only disengageable by squeezing the security ring at pressure points 60, the ring further having formations engageable with the container which hold it captive and substantially immoveable on the container. Preferably the cap and ring are integrally moulded and the frangible attachment between them consists of four bridges 50 which renders the closure tamper-evident. Preferably the security ring has a discontinuous bead 53 with at least one gap (54, fig 5), and the container has a continuous chamfered bead (22, fig 2) and lugs (32, fig 2), so that the ring can snap engage the container and the gap or gaps engage with the lugs (32, fig 2), thus holding the ring captive and immobile. A sealing wad 46 or flexible sealing rib may be provided on the underside of the the cap. The container may be a plastic flexible tube or a can.