A child-resistant package for liquids consisting of a container and a cap therefor. The container has a narrow tubular neck and a protruding concentric spout of diameter less than that of the neck so there is a shoulder at the base of the spout connnecting the spout to the container neck. The spout has an annular lip and a circular rib on its exterior that is located between the shoulder and the end of the spout. The rib has conical upper and lower surfaces which meet at a circular apex. The lower conical surface defines with the neck an angle which is greater than the angle defined between the upper conical surface and the neck. The package includes a cup-shaped cap which fits over the end of the spout. The cap has a disc-like top, an annular skirt and inwardly extending tooth-like elements on the inner side of the skirt which have a minimum diameter of such size and are spaced from the top a distance such that the elements on the cap snap in beneath the apex of the neck rib when the cap is pressed onto the spout. In the disclosed embodiment, there is a compressible liner in the cap which is squeezed tightly against and compressed by the spout lip. The margin of the cap skirt is spaced slightly away from the container shoulder when the cap is in place. The retaining force exercised by the engaged rib and elements is such that the cap cannot be manually removed by a child of tender years.There are tooth-like elements on the underside of the spout rib which interengage with the elements on the cap skirt for preventing relative rotation of the cap and container.