This is a ceramic mug purchased during a visit to a workshop in Okinawa. The glaze transitions from blue to a pale green, creating a very impressive appearance, and each piece has a unique look. There are small glaze variations (speckled color unevenness) on the inside, but this is from the time of purchase and is not a chip or crack. ※ I am also selling another mug with a blue to green gradation from the same workshop. Please take a look if you'd like. ※ If you purchase both items together, I will discount the total amount by 500 yen. Please comment before purchasing if you wish to do so. ・I live in a pet-free, smoke-free, and fabric softener-free environment. ・I have carefully inspected the item, but there may be minor oversights due to my amateur inspection. ・I will sell this to someone who understands that it is a used item.