“I did cook a pizza in it successfully ... Where did she buy the glass pot? T.J. Maxx, she clarified in the comments. “I’m not really sure the brand but it was from tjmaxx and super thin.

Just because a piece of glass cookware is technically heat resistant, it doesn't mean you can use it like all your other pots. So, can you use glass cookware on a stove? Technically, yes.