Fiona Carswell on her Smoking Jacket:

The jacket has a built-in pair of lungs on the front. As the wearer smokes, the lungs fill up with the exhaled cigarette smoke and begin to gradually darken over time. This project was a result of exploring reflective design as it relates to the body, behavioral choices, and information displays.

The jacket probably would've been more effective if she used real lungs. Probably more illegal too. Just like my bald eagle jacket made from real bald eagles.

Source