A Green Lantern keychain. Quickly designed in OpenSCAD. It's not perfect; let me know if you think it can be improved somehow.

I'm going to try to get the angles on the ends of the bars better if possible, but I'm not going to spend a lot of time trying so this may be the best it gets...

Print it. Adjust sizes or ring hole spacing in OpenSCAD if you want. Layer height isn't important; use 0.2mm or 0.3mm to save time.