The Dye Tube is the classic hidden gimmick for the Color Changing Handkerchief. These Dye Tubes are made from metal and highly durable, and they are also flesh colored to protect from flashes. This model has a flexible ribbon in the middle to separate the two silks while they are both partially inside the tube. Some professionals prefer this for the insurance that the handkerchief being disposed of isn't accidentally poked through to the other side. If you prefer no ribbon, that model is available as well.