Manufacturer: Stolzle Lausitz Product Name: Metal Color Pair Tumblers The material is red-free crystal (lead-free crystal glass), which is said to be scratch-resistant, durable, and less likely to become cloudy. Also, since it is a product that can be used in a dishwasher, it is a product that is easy to use on a daily basis. So basically, the material is glass, but it looks like metal. You will probably feel a strange sensation due to the difference between the appearance and the material when you use it. I'm selling it because I was displaying it because it felt like a waste to use. ~~~The following is a quote~~~ Stolzle Lausitz is located near Dresden in eastern Germany. It is a traditional glass factory with a 130-year history that has introduced the latest technology. Its high-quality red-free crystal products are used in luxury hotels and restaurants around the world. The double-colored tumblers have a dazzling shine and a great presence! It has a warm finish that you wouldn't think was made of glass. Organic paint is used, and it is also durable. ● Product size / 175 × 175 × 90 mm [Set contents] Tumblers: φ85 × 120mm (465ml) × 2 Made in Germany * Dishwasher safe, microwave not allowed