lid is arranged on the main part 11 internal stresses build up in the spring shackle 19 the internal stresses loading the lid 16 into the open position thereof up to reaching a switching over point and loading said lid into the closure position thereof after the switching over point is exceeded the lid 16 is of substantially hood shaped design and the lower side thereof which faces the main part 11 in the closure position has a stopper 17 which in the closure position engages in the dispenser opening 12 and closes the latter see fig5 furthermore the extension 28 is integrally formed on the lid in a manner offset from the stopper 17 the extension in the closure position of the lid 16 reaching through the aperture 29 on the upper side of the main part 11 and protruding at the front end thereof on which a projection like first engagement part 34 is formed into the interior of the main part 11 the inner surface of the spring shackle 19 said surface facing the main part 11 in the closure position of the cover 16 has a projection 32 see fig5 which in the closure position of the lid 16 protrudes by a small amount.