Asahi Shokurakukobo Pure Copper Hammered One-Mouth Beer Set of 2 Color: Shakudo (Red Copper Color) Capacity: 160 milliliters Features: Cold Retention, Heat Retention Style: Simple, Modern The ultimate copper cup, polished with meticulous care. Excellent hand feel and the dignity of copper. Copper boasts heat conductivity 5 times that of iron and 25 times that of stainless steel. The double-walled structure provides excellent cold retention, and when you pour a cold drink, it stays cold longer than with other metals. The cup itself quickly cools to the same temperature as the drink, maintaining that coldness. You can feel the difference the moment you hold it. Set Contents: One-mouth beer 160ml x 2 Product Size: Approximately 58mm diameter x 90mm height Product Weight: Approximately 120g Material: Copper (Inner surface plating, mirror finish)