Durable hard plastic and the lid comes off easy for emptying and cleaning. They are also non-flammable and safe to use. These are the best car ashtrays that will last for years. Ash Bucket fits most auto cup holders. It can accommodate fixed or pop out car cup holders in the front or back seat of your car. You don’t have to worry anymore about not having ashtrays for cigarettes in your car. 2 4/10” L x 2 4/10” W x 4 3/10”H