I am listing a thermal tumbler for sale. This item is a prize I received recently when I purchased a DELL PC. It is labeled as 380ml. I am listing it as unused. I myself already use a similar thermal tumbler. It has many advantages and I use it with affection. Cold drinks stay cold, and hot drinks stay hot, with high heat retention and cold retention. Also, it doesn't condense, so you don't need a coaster. Since it doesn't break, it's also incredibly convenient to take camping or outdoors. Thank you.