After a while, the "special cigarette" (a.k.a a bat) will no longer be as clandestine as it was when new. The device is made of painted aluminum, so is heavier than a real cigarette. This means that, unless you have unusually muscular lips, you will have to hold the tube with your teeth--especially on windy days. Eventually you will scratch off most of the paint on the filter end. The business end tends to yellow considerably with age. These things can be handy, but aluminum is bad to smoke through, they clog quickly, and heat is a problem.