I purchased this item new and unopened. I believe it's the first generation, as the key ring doesn't have the Pop Mart logo. I was able to purchase another one, so I'm listing this one. After purchasing, I stored it in a bag as shown in the photos. I believe there are no stains. I plan to ship it as is via Takkyubin Compact. It will be slightly compressed, but please be aware of this. Regarding authenticity, the QR code authentication has been successful. I don't know of any other methods. I believe it is genuine. However, the QR codes on the main body and the box seem to be different. I don't know the details. Please be aware of this and refrain from returns. Please only purchase if you agree to all of the above. Thank you. (_._.)_