“Church key” is a specific type of bottle opener--one with a pointy bit at one end for poking holes in the tops of cans from the days when oil, beer, etc came in cans that didn’t have pull tabs but you didn’t want to take the whole top off of. The pointy end differentiates a church key from your garden variety bottle opener.
NTMP 81: Methanol bliss
“Church key” is a specific type of bottle opener--one with a pointy bit at one end for poking holes in the tops of cans from the days when oil, beer, etc came in cans that didn’t have pull tabs but you didn’t want to take the whole top off of. The pointy end differentiates a church key from your garden variety bottle opener.