This is a double-walled Uebel beer glass. It's said to keep your drinks cold without diluting them. I haven't used it, so I'm not sure how it works. Outer diameter: Approximately 8.3cm Height: Approximately 14.8cm The silver part of the sticker is partially peeled off. This item is over 20 years old. It was stored in a closet, but the storage period is unknown. Since it's unused, I haven't confirmed its performance. Please understand that I cannot guarantee its quality. Also, it has not been washed. I will ship it as is, including the bag and outer box, so the buyer is entirely responsible for hygiene management. Please consider this only if you can accept these conditions. It will be shipped in a paper bag. The following is an excerpt from the "Display Based on the Household Goods Quality Labeling Law" on the back of the product: Raw material resin: Polycarbonate Heat resistance: 120°C Cold resistance: -30°C Capacity: 400ml