These coffee mugs from Japan are no sunken treasure. They might appear to be sinking into the surface, but your eyes are not playing tricks on you – that’s only an illusion created by their unique design.
Thanks to the laws of physics, despite their slanted appearance, these ceramic mugs can hold up water just as well as any other mug. They are definitely made for a funny sight gag and novelty gift. These treasure mugs are available in 5 colors: white, brown, red, green and blue. You can snag one of them over at White Rabbit Japan shop.