It sure does seem that glass could be put to use. Ignoring food-safe containers and windows, there are still many things that could use it. Consider bricks, bo

It sure does seem that glass could be put to use. Ignoring food-safe containers and windows, there are still many things that could use it. Consider bricks, both traditional and in the style of the typical concrete block. These could be glass. There are many options for making them: full melt, sintered, or as aggregate cemented with something else. Floor tiles ought to work. The result need not be transparent; other ingredients would stop that. Fiber glass insulation seems like a reasonable use.