I've been collecting these, but I'm running out of space, so I'm putting them up for sale. They were also new and unused when I purchased them on Mercari, and I haven't used them either, keeping them stored at home. There are some slight traces of sticker residue on the bottom of the cups. Please check the photos. I think they are relatively clean, but please refrain from purchasing if you have any concerns, as they have been stored at home. Thank you for your understanding and purchase.