Great article! I agree about Lisa's character. She's posh, but unpretentious. There's also something interesting about her vernacular. This script was written around the same time American women started referring to their handbags as purses (not sure why). Lisa uses the term handbag in all but one instance (which might be referring to a smaller accoutrement, i.e. an actual purse, not the aforementioned handbag).

The character of Stella is clearly working class and only uses the term purse, even if it's a handbag that she's referring to. I might be clutching here (no pun!), but Hayes seems to have chosen his words consciously and carefully for these characters (I'm assuming to provide contrast).

Or I could be completely wrong!