Abstract: A child-resistant closure cap for fitting to an externally screw-threaded neck of a bottle is formed as a single integral injection moulding, preferably of polypropylene, forming an internally screw-threaded skirt, a bowed top wall which closes the top of the skirt, a force-applying member on the upper face of the top wall and lugs around the periphery of the underside of the top wall. The top wall is movable for snap action by the application to it of a force through the force-applying member between an upwardly bowed position and a downwardly bowed position. When the top wall is in the downwardly bowed position, the lugs engage with inward projections on the inside of the neck of the bottle and this prevents the closure cap from being unscrewed from the bottle. When the top wall is snapped into its upwardly bowed position, the lugs are moved clear of the inward projections and the cap can then be unscrewed.