Thank you for viewing. This is an offering for a somabito × OLD MOUNTAIN double-name Sierra cup, a black Sierra cup. The item has been stored at home without being used after purchase. I believe this is a rare item now, so how about taking this opportunity? Comes with a leather grip! [Product Description] Black oxidation coloring is applied, and the black color is achieved using a technique that colors stainless steel, rather than painting or dyeing. Generally, black oxidation coloring is easy to apply to iron, but processing stainless steel requires advanced technology. Through collaboration with Somabito, a beautiful, even color development has been achieved.