I was trying to make a normal bag clip a bit more practical, so I don't have to take it off every time and just have to unscrew the cap.
The previous clip I was using also bent because of the thick plastic foil of the coffee bag.
Works especially well for refilling the coffee on my coffee machine!
Update - 11/26/2018 - Changed dimensions of hinge so it's more stable and better to print, added new cap.
0.2mm layer height, 0.4mm nozzle
Printed with 5 perimeters for stability