YouTube user noncents shows us a neat little trick that makes smoke blown into a glass able to sit at the bottom of the glass and be poured from said glass like a liquid. His instructions:
Don’t inhale the smoke just pull it into your cheeks and let it fall out your mouth along the inside of the tilted glass. Do not breath as you do this or it will blow it all away!
It’s all just science: The unfiltered cigarette creates denser smoke, and as the smoke hits the cold glass, it cools, causing it to react in the mesmerizing way seen in the video.