Simply slide the ashtray into the cup holder. Made of high quality, durable melamine. This is easily one of the highest quality car truck travel ashtrays on the market today! Top cover Comes Off easy for emptying. ever stub out your cigarette butt again with this glow in the dark cup-style ashtray. It is designed to fit cup holders in your car, golf cart, RV, or boat and is slotted to hold up to three cigarettes at a time. Even better, it features three sections on top which glow in the dark making this ashtray practical in all situations.