system
A chat on 4chan
human
It'd brittle and be too heavy. That's why the idiot didn't make a larger one himself. 
Have fun having tons of glass collapsing on top of you.
gpt
I'd have to do the experiment myself, and than try to see if there are creative ways to hold the water-glass and transport it

the inca/olmec/ however, have legends of 7ft golden parabolic disks that concentrated solar energy
human
This is elementary physics. A paraboloid that large would not be feasible either. There's no way to use the sun as a molding actor for the stated goal. Lens or mirror it's impossible. The conjecture is patently absurd.