Summary

Kitchen or bathroom towel holder/
Inspired with https://www.thingiverse.com/thing:1218797
Membrane made of PET-G. There are three of them - soft (2 layers, 0,3 mm), medium (3 layers, 0,45 mm) and hard (4 layers, 0,6 mm). I'm using medium one.
Case can be assembled and disassembled easily to adjust the membrane that is used.
Be aware of pushing membrane with your bare finger. It can be painful. I tested it. :)