I have done some hot ethanol extractions with glasses of champignons. I dont believe that we really need expensive glasses. I have bought some because of tutorials and because they looks very pretty. If we would need higher temperatures for extraction it could be better, but i havent any problems also with the champigon glasses. There are many glasses like for example marmelade glasses from the marmelades you buy.
I bought 4oz and 8oz canning jars but I had a couple of marinaded artichoke hearts that came in 8oz jars and after a good washing they worked just as good as the canning jars.