Abstract: The subject of this invention is a storage unit with identifying markings consisting of a receptacle that encloses a storage area to receive the material to be stored, an opening in the receptacle leading to the storage area, and a closure member that may be secured temporarily over the opening. The distinctive feature of the invention is that the identifying markings are formed by a group of particles of a marking material which create a unique electromagnetic radiation image or unique electromagnetic response image and are arranged in a random distribution over the covering surface of the closure member and/or in the material of the closure member, and/or on the covering surface of the receptacle and/or in the material of the receptacle.