Simple Cable Clip

I usually clamp the power cord of my laptop between two tables. This is quite handy because when I need it I do not have to crawl under the table to look for it. But when the tables move slightly the plug falls through the gap.
To prevent this I designed a small disk that can be clipped on the cable. Now the disk holds the plug in place even if the gap between the tables is getting bigger.

The inner diameter is 6mm.
Print it with a layer thickness of 0.1mm.