This is a little holder to store a dental floss holder like this one (https://amzn.to/3NfzeSH) on a IKEA EKOLN (https://www.ikea.com/de/de/p/ekoln-zahnbuerstenhalter-dunkelgrau-00441621/) toothbrush holder while preventing it falling in all the time.
Videos:
https://www.tiktok.com/@bastelsaal/video/7308370553021173025
https://www.instagram.com/p/C0ZMNKvovjp/