I've been undergoing clear aligner treatment since the end of last year, and these are the aligners and dental molds. They are in-house aligners, not Invisalign. These are custom-made, so they cannot be used by anyone else. I've cleaned them to a minimum extent, but there may be some dirt, as they were used in my mouth. There are about 40 pieces, and the aligners have some chips and scratches. I don't mind throwing them away, but I thought someone might need them if they had this many dental molds, so I listed them for now. How about using them for Halloween decorations?