Abstract: A closure member for the end of a soft drink container, beer container or the like comprises a pair of substantially parallel, upstanding ridges which are adapted to be squeezed toward one another to tear an opening in the container closure along a line of weakness.

Abstract: A marine trailer comprising an elongate collapsible, flexible container and at least one open-ended rigidifying conduit of a flexible-walled construction extending along the container with the cross-sectional area of the conduit decreasing from the front towards the rear of the container. Thus ambient liquid enters the conduit and, on flowing therethrough, exerts a pressure on the flexible wall of said conduit which is greater than the external pressure.The trailer may also have a safety reservoir which is disposed at the rear end of the container and is automatically communicable with the container in the event of rupture of the container.