A flame retardant resin composition comprising a specified metal oxide andor trivalent phosphorus compound and a specified phosphazene compound together with an aromatic resin added according to necessity. One side wall of the container is hinged to another wall of the container to provide an opening for insertionremoval of foodstuff and to form a lid for closing the opening. The multi-contoured inner surface can include a plurality of surfaces. An optimum condition of the reproducing operation of the pickup device is detected on the basis of the second information. The porous bed is interrupted by a sealing material at the level of the transverse seal so that the porous bed is hydraulically interrupted.