Abstract: A sealable container is disclosed in which a cap is provided having a circumferential outer skirt for engaging a container and having a circumferential resilient depending inner member spaced from and extending substantially parallel to the outer skirt. The cap is substantially light-transmissive over at least a portion of the visible spectrum, so as to permit viewing through the cap. A container is provided having a rigid side wall for engagement with the resilient inner member of the cap internally thereof. The side wall has an end fitting within the resilient inner member of said cap and spaced radially inwardly therefrom when the cap is secured to the container. The side wall is tapered. Structures are provided on the container remotely from the end of the rigid wall. Cooperative structures are provided on the cap for preventing the cap from being removed from the container without depression of the cap on the container and rotation of the cap on the container.