My mother had a pie pan that was hexagonal, to make it easier to get 6 equal size pieces. Trouble was, she usually cut it in 8ths, which made for some weird bends in the crust on your piece of the pie.
One semester in high school I wore the same clothes without washing them until I took them home over the Christmas break. Threw them into the fireplace, they nearly exploded.
Probably baked clay cups, not wine glasses