Abstract: A cartridge containing two liquids, includes a first elongated cylindrical housing having a first end and a second opposite end; a second elongated cylindrical housing having a first end and a second opposite end; the first and second elongated housings being connected together in a lengthwise direction thereof at the first ends thereof and being slidable relative to each other in said lengthwise direction; a first pressure stopper fitted at the second end of the first elongated housing, the first pressure stopper having a central weakened zone which may be crossed when the cartridge is closed; a second pressure stopper fitted at the second end of the second elongated housing, the second pressure stopper having a central weakened zone which may be crossed when the cartridge is closed; a longitudinal needle with thin walls and a sharpened end, provided at the first end of the first elongated housing; a tearable membrane fitted to the first half of the second elongated housing adjacent the end of the needle; an

Abstract: A new flask for two products, includes a general flask body having a neck; a vessel housed inside the neck of the general flask body and having a weakened part; the neck of the flask body including a thread, and a flange at an upper part of the neck; a cap which screws onto an outside of the neck, the cap including a thread which is complementary to the thread on the neck, a flange which is complementary to the flange on the neck, a wall defining a hole, and a vertical projection which emerges from an inside of the cap, in the form of a short cylinder with extremely sharp edges, the length of the cylindrical vertical projection from the inside of the cap being such that the vertical projection facilitates cutting of the weakened part of the vessel, when the cap is screwed down; and a cover hinged to the cap and made from the same material as the cap, for fully sealing a top of the cap by pressure, the hinged cover of the cap having a central projection at a lower part thereof corresponding to the hole and of