An ashtray collection consists of various ashtrays gathered by enthusiasts or collectors. These items can be made from different materials, such as glass, ceramic, metal, or plastic, and often feature unique designs, colors, and shapes. Collectors may focus on specific themes, such as vintage ashtrays, those from particular locations, or those created by famous artists. Many collectors enjoy the history and artistry behind each piece. Some ashtrays may be linked to specific events, brands, or even celebrities, making them valuable to collectors. The hobby can also include researching the origins and significance of each ashtray, adding depth to the collection.