Abstract: The invention concerns a device comprising a combination: of at least two individual flasks or containers (1, 2) mutually linked by all or part of their undersides (3), and of a removable fixing system (4) essentially comprising a suction cup and/or a rod (6) provided with a hook, while one of said flasks comprises in said underside a cavity which, alone or in combination with a similar cavity located on the underside of another flask of said combination of flasks, defines a recessed space wherein the head of said suction cup and/or said rod provided with a hook can penetrate and remain force- or spring-locked, with the possibility of being eventually rotated and separated by a simple manual effort.