1.LUMINOUS: SHOULD ABSORB LIGHT BEFORE USING, can put it under sunshine or lamp, the light absorb more, glow time will be longer. This luminous ashtray with noctilucent design for smoking in the night, looks very decorative during night, great choice for indoor also outside 2.MATERIAL: This ashtray use Eco-Friendly Material Silicone which is more healthy, easy to clean, also can be folded 3. HEAT RESISTANT: Rubber ashtrys is High Temperature Heat Resistant, you can directly put a cigarette out, will keeps the smell down, not like the other plastic ashtray bubbles up and turns white and black. 4.APPLICATION: Perfect for Indoor and Outdoor Use, like Patio, porch, Home, Office, Restaurants, hotels, and bars. 5.If you want it to stay clean, you need to wash it often instead of once for a long time