So you empty it out. I remember doing this when I was a child and my parents were smokers. Part of cleaning the car (for $2 a week, or something like that) was emptying the ashtrays.
Someone I know tossed a cigarette out and it bounced of the hood of a California Highway Patrol car. I still laugh when I think about it. She didn’t see him coming up beside her. He pulled her over immediatly. The fine was between 300 to 400 dollars as I recall.