I took apart my cigarette filter and found a small blue plastic object. What is it?

Answer 1

The blue plastic thing resembles your soul and going to heaven after you get lung cancer. It is a warning that after the rest of the body is gone and your lungs turn black, there is nothing left but your soul. Stop smoking and save up your money for something useful like a new car or something that won't kill you.

Answer 2

Could C.I.A. listening device. What have you been up to!