Isofix hook to keep windscreen washing liquid bags upright. Potentially works for other stuff as well, don't let my problem dictate your scope of usage.

Printed in PETG, infill 100% while 50% might be enough.

FreeCAD file included to make your life easier if you wish to tune this part to your liking.

STEP instead of STL, as parametric model is always superior to mess of sprinkled triangles.