To answer GP's concern, they're x-rayed in reprocessing, which would detect unsound bottles.
It's too bad glass beer bottles seem to be going out of fashion these days in Ontario. Instead, people seem to be moving to aluminum cans. I miss the old days when you look at the bottom of a beer bottle and see a ring of wear because that glass had been recycled dozens of times (just washed and reused). You can see the ring of wear in this old bottle: