This is a non-sale thermos bottle engraved with the BYBIT logo. It's a very valuable item with the logo of BYBIT, a major cryptocurrency exchange. It comes with a stretchy cover. I received it as a gift and kept it carefully, unused, but I'm selling it now to organize my belongings. The body is marked "Stainless Steel Thermos Cup." It has a removable inner lid, allowing you to put in tea bags and pour in hot water. Outer diameter: Approximately 88mm.