One additional thing - those old water jug carboys from the 1920's - 1950's were made of seriously HEAVY thick glass. I have one here at my house that I throw change in. Incredibly thick, which you would figure they would have to be for delivering water reliably for all those years.
The glass carboys I initially bought for this hobby were nothing of the same effort. Lighter and thinner by a huge degree. If I had to use glass, I'd suggest one of those vintage ones used for water. The current ones are too scary, those pictures show deep tissue damage, I need the use of my hands. They fit nicely in my recycling trash bin. Go PET plastic, yeah!