be a polyolefin (in particular polyethylene) of a grade for molding without additives which is substantially free of such additives as lubricants, fillers, colorants, stabilizer and ultravioletabsorbers.The metal foil-containing laminated film B has the layer constituent sealant layer/metal foil/substrate film layer, sealant layer/metal foil/sealant layer or sealant layer/metal foil or the like.