Libbey Round Glass Safety 5" Ashtray - Full Color Aqua - Additional Vibrant Colors Available by TableTop King Extra outer ring prevents butt-heavy cigarettes from tipping out of the ashtray. Quality piece of Libbey glass craftsmanship. Libbey Round Ashtray Glass 5" Diameter Helps prevent burns on your floor. Due to variant temperatures from each manufacturer of dishwashers we recommend hand washing this product.