According Description A special construction prevents the oxygen supply, so that smoldering remnants suffocate. it does not work. If the cigarette is not carefully expressed (which must be carried out a bit inconvenient to the funnel-shaped edge), she smokes more diligently. Bad it is when the cups are already tipping; possibly the burn with. Then it smokes like a smokehouse. Unfortunately, you can not remove the cup to delete or to empty it, but only tilt. I have drilled the hinge and used a pen, so that you can pick up the cup now.
