I made the first bottle opener to see if it could be done without having a medal insert in it, and also be a slim design. These fit great in pockets. One says "Another ONE!" and was made to be slim/compact. The second, is shaped like a beer can and says "BEER" on it. So far they have worked great, but I have yet to get much use out of them. Enjoy!
Update(12/11/17): So far PETG seems to yield the most durable bottle opener, with PLA working good, and ABS being too soft to hold up.
Monoprice Maker Select V2
I printed these in PLA and would recommend doing so. For infill you will want 80%-100%, and I also recommend using three or more perimeters. I used rafts to make bed removal easy, but they aren't necessary.