A molded plastic container, in accordance with one aspect of the present disclosure, includes an insert molded into an exterior surface of a wall of the container. The insert is of plastic construction that includes a UV brightener that is visible under UV light to verify authenticity of the container. The container wall and the insert preferably have identical colors under visible light. The insert preferably is of two-piece construction with an outer portion of the insert being exposed at the exterior surface of the container and an inner portion underlying the outer portion. The inner and outer portions preferably include respective UV brighteners that are visible as different colors under UV light. The outer portion of the insert preferably is removable to expose the inner portion and thereby to provide layered security for which the outer portion is first visible under UV light and, when removed, exposes the inner portion of the insert for illumination under UV light and radiating a different color from the outer portion.