• strong bottle opener using a screw and an washer.
• small and easy to add it to your keychain.
• it has a small gap for an 5x2mm magnet to be glued on the back and use it as a fridge magnet.
• no AMS needed to print it in more colors. Just a couple of filament changes, depending on your preference. You could print it in one color if you want.

What you need:

• screw: M4x16mm. You can try with different M4 screws heads and see how it works for you. The part hole is 19mm long.
• washer M4 with outer diameter of maximum 9mm. (this is optional, but makes it way easier to open the bottles)
• Optional magnet: 5x2mm.