I was worried I'd lose the USB-C dongle for my Razer Barracuda X gaming headset so I designed a holder that clips onto the heads strap.
This is best printed on its side like in the attached image to provide enough strength in the clips so they don't snap off.
I printed it in PLA with 50% infill and it clipped on tightly and didn't break.
The author marked this model as their own original creation.