Perhaps they carried the ultra rare Sunset Sarsaparilla bottle opener that ol'Festus dispenses for 1000 blue star caps

I'm currently working on a wooden Pip-boy that will distill and age whiskey

When I was much younger and much stupider, I discovered that if you bit coke bottle cap's in the right way, you could actually

remove them with your teeth. The other option might be to use an assault rifle if you have one.