My old ROTRING is getting on in years; So I kept looking for a new out. Hm, the design is no longer the same. Similarly, yes, but not better: thick, bulky and above all impractical. Letzters refers to the push away the air used. With the old equipment was pressed on top of the retaining clips; the new one has to press a nub next to the clip. Otherwise, it is of course a useful device if you want to have in 1 unit 3.