A powerful compact bottle opener that you can always have with you.

You need only 2 washers with 8.8mm outside diameter and 0.8mm thickness (the inner diameter is usually 4.2 - 4.4mm, but it is not significant).

Print instructions

I recommend using 3 perimeters and dense/strong infill. Print it from PETG if you have the option, but it works well from PLA with this setup.

No support needed.