I love the closed version but it wasn't working very well for me mainly because the curve of the filament was causing a jam and the clip wasn't moving freely. I have removed a part of the closed section and this allows the filament to move freely as it leaves space for the filament curve. I have used this version for months without any issue.
I use a filament filter and the closed filament clip in each of my spools and I leave them on all the time which makes it very convenient.

Update : I have added a version with a 5mm hole for hanging (thank you DiverRich)
Update 2: I have added a modified hole version, I have extended the two arms by 1mm to allow more space for the filament curve because I think the filament may be rubing against the flat side when the clip is hanging.
The author remixed this model.