It is a cigarette that has been smoked and extinguished. Something about this particular brand makes them distinctive.
This is the brand of cigarette Benny smokes. Along with the engraved cigarette lighter and information gained from Manny Vargas, they can be shown to Swank at The Tops casino as evidence during the quest Ring-a-Ding-Ding!
PC Playstation 3 Xbox 360 When picked up, one or two may fall into the ground. [verified]