Product Description This is a pair set of Kai-ragi (sea cucumber) foaming cups by Sho-fu, a master ceramic artist of Mino ware, Shigemichi Tabata. The unique granular texture (Kai-ragi) is a characteristic feature, and these beer/free cups are designed to enhance the foam of beer. A pair of two colors: **blue (turquoise blue) and white (ivory)**. The inside is black and has a rough, baked finish that creates fine bubbles. Brand new and unused, they come in a high-quality wooden box. Perfect for home use, as well as a great gift.