These were non-sale items given away with the purchase of a PET bottle at a convenience store a few years ago. I'm selling them as a set of two ^_^ The diameter is about 2.8cm, so some PET bottles may not fit. The water bottle in the third photo, which is in the background, had a diameter of about 3cm, so it didn't fit. I think they're cute as mascots too. I hope they can be useful for a Mario-loving child's collection ^ ^ Due to a shortage of Yu-Packet Post Mini envelopes, I will initially ship via Rakuraku Mercari Bin (Nekopos). I will switch to Yu-Packet Post Mini as soon as I can get them. Thank you very much ☆