Starbucks My Bottle Stainless Steel Portable Thermos 355ml, Opened, Unused From the 2023 Lucky Bag. No outer box, stored by a private individual, so please refrain from purchasing if you are sensitive to minor scratches or stains. A rattling sound can be heard when shaken, but this does not affect use. This is common in stainless steel bottles, caused by the friction of the metal foil inside the vacuum-insulated double-wall structure. This is not an abnormality and does not affect the heat retention or cold retention performance.