Retail price: 22,000 yen This is a copper and tin-plated tumbler from the Guinomi HANA series. I'm selling it because I don't use it. The tin plating on the inside has a high ion effect, which is said to make alcohol taste smoother and more delicious. Also, copper has excellent thermal conductivity, and when you pour a cold drink, it cools down quickly and keeps it cold. How about it as a gift? *This is for cold drinks only, so it seems you can't use it for hot drinks. [For Cold Sake] Copper has excellent thermal conductivity, and when you pour cold sake, it cools down quickly and maintains its coldness. When you pour cold sake, water droplets form on the surface, making it look stylish. [Enjoy the original taste of alcohol] Gold has no metallic odor and does not change the aroma or taste, so you can enjoy the original taste of the ingredients. A tasteful design ● Product size (mm): 60 x 105 ● Material: Inside... Copper tin plating Outside... Gold plating, baked clear coating