Black Sierra is specially processed so that its color will not fade.
This Sierra cup can be used for a long time without worrying about discoloration, thanks to a technology called "black oxidation coloring" that adds color to stainless steel instead of painting or dyeing.
Made in Niigata Tsubame-Sanjo, it can also be used over an open fire.
*Due to the manufacturing process, there may be some scratches. note that.
Φ12cm x height 4.5cm / 320ml / Stainless steel (18-8) / Black oxidation coloring