My mother had some problems to open a bottle. So I asked her if I should print a little helper and without a second to think about it the answer was: "Yes".
So I did a quick search and I found some tools. I showed them to her and she picked this.
I read through the comments and I was a little bit worried because of breaking the thing and I didn't wanted to print it at 100% infill. I remembered this video https://www.youtube.com/watch?v=q0YsC53mFvY&t=201s and I've quickly redrawn the bottle opener in Fusion 360, configured the simulation and 45 minutes later I started the print.
And right now I've to say, that everything worked out fine.
Das Filament PETG
50% gyroid for the main part and 100% rectangular for the modifier (simulated part)