This is a copper mug. I brought it camping once, but I'm selling it because I don't think I'll use it. [Made in Japan] Niigata Tsubame-Sanjo The excellent thermal conductivity of copper provides an instant refreshing sensation when you pour in a cold drink, making it perfect for outdoor use. It's also durable, and the more you use it, the more you'll appreciate the aging process, making it a truly unique item. For the cups you use most often outdoors, we recommend high-quality tools that can last for 5 or 10 years. Copper Beer Mug (Medium) 12oz Black Copper Finish Product Dimensions: 87φ x 91H Capacity: 340ml Box Size: 95 x 110 x 110 Body (Pure Copper) Handle (Brass)