Abstract: Apparatus for applying cosmetic preparations in liquid or paste form comprising a cylindrical casing provided with a slidable piston which divides the casing into first and second chambers which are sealed relative to one another. The first chamber contains a mixing member which by an operating stem guided sealingly to the outside through the piston and the second chamber, can be reciprocated inside the first chamber. This first chamber may be filled with a cosmetic preparation to be emptied by controllable amounts by an applicator detachably fastened to the casing. A tubular casing extension is inserted into the free end of the second chamber and contains a compression spring for pre-stressing the piston. The casing extension is telescopically movable into and out of the second chamber. At the free end of the casing extension a locking mechanism is provided by which the casing extension, when fully inserted into the casing, can be detachably locked to the casing.