I purchased these in June 2025 for use in a restaurant, but I ended up not needing them, so I'm selling them. I opened one to check, but the rest are unopened. The cardboard packaging has some peeling, but the contents are fine. They're a perfect fit for a 500ml beer, including the foam. They're made of double-walled glass, providing excellent insulation and preventing temperature changes from the outside. They also resist condensation. They usually sell for over 3000 yen each.