oh shit toiletpaper radiator clip

This is a simple toilet paper holder. It clips onto a standard (in Germany 20.5mm) diameter towel heating. It features a rather minimalistic design and is definitely stable enough for regular use. Adapt diameter to your heating in onshape. I designed the clip to be 1mm larger then the actual tube, this clips really tight.

Also it makes fun of you when you didn't stock up enough rolls ;)
Or change the Message to what ever you want in the source:
(find the different designs in onshape's branc