But transport and sorting (glass is hard and sharp) eat into that margin, so presort

I know that in some places they standardize the glass beer bottles to one or two types and strongly encourage people to bring the bottles back to the same location that they get beer from.

This results in a circular supply chain that sees bottles sterilized and reused many times. The number I heard was an average of 8 uses on average before a bottle gets a chip in it that renders it unsuitable for reuse, and then it is recycled.

It seems to me that this tight distribution loop is a key part of successful reuse and recycling endeavours.