The pure copper tumbler was developed as an item that can be visually enjoyed in various settings, under the concept “enter through impression and capture the heart.” The Japanese proprietary variant metal spinning process was made possible by adding twists and other works on the surface. The unique surface design displays a variety of luster and aspects depending on the light, such as in the home, bar or outdoors. The tumbler’s inner side is coated in tin, which has become increasingly rare in Japan; the safe and secure utensil makes chilled beverages even more delicious. The product is manufactured entirely incorporating Japanese technologies, from taking a single copper sheet to the metal spinning and coating processes.