An experienced smoker, when deprived of a genuine ashray will immediately begin questing around the room, cigarette first, for something to ash in. The first target is an empty (or almost) soda can. When one is not availible, the smoker may turn to a cup, dish, plate, sink, toilet, bathtub, window, or, if in a bar or a club, the floor. This can be a hazard if you tend to absentmindedly leave your soda cans lying around near the computer as you may one day absentmindedly drink from the wrong one.