i drilled a van window for the vent latch before with a regular masonry bit. i took it really slow, used light pressure, and after i think 45 minuites i made it through. i kept my finger right next to the bit to feel the heat build up. but this was the second attempt as i broke the first one when it got to hot. so you can drill tempered glass.
He had the remaining fry yesterday. New fry tank is working great. Sorry they are blurry. I told them to hold still, but being typical kids they ignored me and continued to wiggle around