Last year, Fiona Carswell made a jacket for polite smokers. The Smoking Jacket, as it is called, has a built-in container with a one-way valve into which the smoker blows smoke (instead of in the faces of the people around her).
The smoke is then channeled through plastic tubings and filters through a set of see-through lungs at the front of the jacket. The lungs are made from air-filter material, which darkens over time, to visually simulate the effects of smokes on real lungs.
http://www.fionacarswell.com/SmokingJacket.html - via Trend Hunter, Thanks Jon Jason!