Factory Sold Girdles How Much Is GLASS (if I Need To Buy Some For Mass Production, For A Factory) - And In What Form Is It Sold?

How much is GLASS (if I need to buy some for mass production, for a factory) - and in what form is it sold? - factory sold girdles

I need to know how much to buy it for the mass production of glass flasks (- a general idea, an address for a company?) Would cost site with great prices.

So, please give as glass could get a lot for the price.

And how do they sell? Sheets, plates ..?

Thanks