SUPERB MATERIAL:Made of high-grade thick ceramics materials.Stylish-shaped and exquisite craftsmanship enable the surface more durable. Not dishwasher accept, Hand wash only to protect the film on the cup. UNIQUE COLOR CHANGING MUG：When it has cold liquids or nothing in it, it looks like a starry mug, while pour a hot liquid into it, the planets and milky way appears magically. The effect of the color-change is extremely fascinating overall. SOLAR SYSTEM EXPLORATION MUG：The heat changing mug is a mysterious exploration for the humanity who want to learn astronomy or already have a vast knowledge of the solar system which adds more education touch. an essential mug for any space enthusiast and wonderful device for talking among enthusiasts. EXQUISITE GIFT: Packed with a well-designed security box, allowing to give away on a variety of occasions, such as weddings, dating, anniversaries, birthdays, Valentine's Day, Mother's Day and so on. SERVICES GUARANTEED: MUGKISS offering 2 years quality assurance, we will respond to you within 24 hours! When hot water is added, the black starry sky gradually disappears and mysterious planets of the solar system appear. After cooling, restore to its original state.