The glass will tolerate the heat, but I've discovered that a household electric range is not responsive enough to finetune against boilovers, which are not the easiest to clean on the electric element and the whole range setup. i tried water bath but noticed that the water boils faster than the starter wort so it's difficult to maintain a wort boil. Of course both of these setbacks could be attributed to user error.
I take the starter out to the side burner of my grill, stirplate is on the upgrade list, hoping that is more responsive than the household range, if not, by then i'll just buy a larger flask.