This is a pair of Kutani-yaki teacups for couples (with a box). They feature a beautiful gradation of silver glaze in purplish-blue to green. The color is applied over silver leaf, creating an indescribably mystical shine. Although unused and new, they have been stored at home for a long time. The following is from the "Soshu Gama" explanation on the Tourlife website: The Beauty of Silver: Contemporary Creative Kutani "Underglaze Silver" Vessels using "Underglaze Silver," now considered a representative technique of Kutani-yaki. In the creation of underglaze silver, Soshu Gama, which has a first-class brand in underglaze silver, spent more than a decade immersed in glaze research and succeeded in independently developing a high-temperature firing glaze. The vessels of modern Japanese style that showcase the brilliance of silver, a glass-like texture, and fantastic colors are born from this renowned kiln. Currently, "silver glaze" is the most noteworthy technique in "Kutani-yaki."