It is a good gift for family, friends, customs and personal use. You can always give them surprise and happiness.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.Please be aware that picture, photo, logo etc. cannot be 100% hidden in the mug. Black mug can hide 70-80%. If you look at the mug carefully, you can see the profile.Mugs are not dishwasher safe. For best results and to maintain image quality, we highly recommend hand washing this product. 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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