Product Description: This is not an official product, but it changes color effectively when cold beverages are poured into it. Capacity: Approximately 700ml Shipping will be on November 10th, or at the latest, November 11th. *Notes: - There are no smokers or pets in the seller's environment. - To prevent swapping and due to this being a private sale, returns are not accepted. - The product will be cleaned appropriately before shipping. - Please feel free to inquire about changing the shipping method. *Important Considerations: - Please be aware that this item is also listed on other platforms. While I am careful, if simultaneous purchases occur, the later purchase will be canceled (no transaction). - Prices may vary due to different platform fees.