Is this a campaign prize, as "Lawson" is written on the bottom of the cup and the box? Date unknown. Stored at home. Only one cup. Cute blue with a white outline of Hello Kitty. A simple design without eyes or a nose, making it a slightly more mature Kitty-chan♪ Image 4: The mouth area looks yellowed, and I tried washing it, but there was no change. It is unknown whether this is due to aging or is the normal condition. #HelloKitty #Mug