As the title says, I was looking at codingCat's original command strip wire clip design, and realized with a small addition it could be made into a curtain clip as well. Useful for holding curtain edges open or closed without the need of straps or drilling hooks into the wall or window frame, especially if trying to keep blackout curtains from being moved by fans.

Any filament will work, I printed at 50% infill for durability but more flexibility and material saving, but could probably printed as low as 10% depending on your needs/filament.