this is a cigarette butt
Cigarette butt as the rest of the smokers will be trash in the ashtray and then will be thrown into the trash. For some people cigarette butts are no more dangerous than the cigarette itself. But for some (small) other, cigarette butts are often also used for other things. An example is to repel ants around the house, or to remove the filter cork as a household handicraft.
