They form a puddle under them and it is impossible to fix water tanks on the base, I think if the holes for the water inlet were twisted and the water tank could be fixed on the basis of such a problem there would be no such problem. Different pros: Lightweight, comfortable, concise, low price, large capacity, easy to operate, silent Different cons:  It forms already under itself, poor response from the buttons, the water tank is not fixed in any way, not quite accurate measurements.
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