These little clips are a simple and functional demonstration of a compliant mechanism. The single part flexes to act as a reverse action gripper. Great as a bag clip, phone stand, or otherwise.
I printed mine with PLA at 100% infill. PLA will lose clamping strength if left in the open position for a long period of time, especially at higher temperatures. ABS, PETG or ASA may be suitable options. Leave a comment if you have success with another filament!
Scaling down to 50% should still work, but may require clipping the front clips to separate them