MUGKISS Magic Mug 330ml Starry Sky Design Star Trek Funny Birthday Gift for Exchange Gift Heat-activated - Boyfriend, Girlfriend, Friend,

【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. SUPER MATERIAL: Made of high-grade thick ceramic material. The design is stylish, the technology is excellent, and the heat-resistant surface is more durable. It does not need to be washed in the dishwasher, just wash it by hand to protect the film on the cup. Unique color changing cup: When filled with cold liquid or empty, it looks like an ordinary mug, but when you pour hot liquid into it, stars will mysteriously appear. The color variation effect is overall fascinating. Space Exploration Cup: For humans who want to learn astronomy or have a rich knowledge of the space system, the heat exchange cup is a mysterious exploration, which enhances more educational significance. It is a mug that every space enthusiast needs, and it is also a great equipment for enthusiasts to talk with each other. EXQUISITE GIFT: Packed with a carefully designed security box, it can be given as a gift on many occasions, such as wedding, dating, anniversary, birthday, Valentine's Day, Mother's Day, etc. Service Guarantee: MUGKISS provides 2-year quality guarantee, we will reply to you within 24 hours! When you pour hot water into it, the black color gradually disappears and a mysterious pattern appears. After cooling, it returns to its original state.