The word 'magic' popped into my head even before I read your text, because apparently that's what 'glass' evokes as an association. Perhaps because of its mysterious way of production, perhaps because it is so fragile and delicate, perhaps because of the connection, somehow with the technology of alchemy even. I don't know, but the manufacturers of glass products are real magicians, and I can only envy you for visiting such a workshop!🧙‍♂️🪄