I made a cool kook for towels and I wanted to share it here, its got a marble on the inside that moves up when something is placed in it and then when release the marble slides down and holds whatever was placed in it! I had a hard time getting this to work after I saw a video of a wood working using this mechanism to hang papers on a wall. The main issue I had was when pulling the towel hard the brown piece would flex too much and let the marble out, but it was fixed by adding more lips to the inner mechanism and reducing size to prevent flex. Hope you all like it! Here’s the link if anyone wants to download it

https://makerworld.com/models/720043