This is a Chikawa stainless steel tumbler, exclusive to 7-Eleven. It has a mouth diameter that allows you to put a coffee cup directly into the tumbler, and a large 550ml capacity. Made of stainless steel, it keeps the temperature of hot and cold drinks for a long time. You can use it at home, in the office, or when you're out and about. [Product Details] Size: Height 15cm x Outer diameter of drinking mouth 8.6cm Capacity: 550ml Material: Body/Stainless steel Country of manufacture: China It has never been opened. There are some scratches on the case. Although it is new and unused, it has been in someone's possession, so please refrain from purchasing if you are sensitive to this. I haven't written much, but I would appreciate it if you would take a look at my profile.