Flexible self-closing container

A flexible self closing container comprising two flat, rectangular, equal size panels of flexible sheet material sealed to each other around their outer periphery, one of said panels being made stiff and resiliently bendable about an axis, at least in a region near one end thereof and the other panel having a slit extending along a line transverse to said axis and located within said region, said slit terminating short of the sides of said container, the stiffness of the resiliently bendable panel being sufficient to hold the other panel flat so as to return the other panel to a flattened condition in which the slit is held closed after it has been opened to insert or remove items into or out of said container, so that when the side edges of the container are squeezed together near said one end, the one panel is bent in a concave direction facing the other panel and causes a portion of the other panel on one side of the slit to flex outwardly, thereby to cause the slit to form an opening into the container, and when the sides of the container are released, the resilient panel reverts to a flattened condition to bring the region of the one panel on said one side of said slit back against the resiliently bendable panel, thereby to close said slit, wherein the one panel is made stiff and resiliently bendable by means of a further panel interposed between said two panels and which extends over said region.