New 11 Oz. Black Ceramic Mug for Gifts .Microwave safe - . Picture, photo, logo etc are hidden in the mug. When you pour hot water of 60℃ or above into the mug, the hidden picture will appear. The hotter the water is, the quicker the picture appearance is. When the water becomes cold, the picture will hide again. Mugs are not dishwasher safe. For best results and to maintain image quality, we highly recommend hand washing this product. Do not Scrub and Do not Dishwasher wash. Mugs are microwave safe, however, the design may fade over time due to the heat exposure from the extreme heat of the microwave.
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