This is a 350ml silver Extra Cold Tumbler designed to be chilled in the freezer. - Brand: Asahi - Model Name: Extra Cold Tumbler - Color: Silver - Usage: Chill in the freezer for 60-90 minutes before use. - Capacity: 350ml I was organizing and found this unopened. I opened it for the photos. As stated in the instructions, it's quite heavy compared to a regular tumbler when you hold it. The third photo shows the bottom. Thank you for looking.