(NYTimes) - A FEW weeks ago, Suzanne Ermel, who lives outside of Chicago, was at a Jewel-Osco supermarket when she saw a woman put a five-liter box of Franzia wine into her grocery cart. “I said, ‘Don’t do it!’ ” said Ms. Ermel, 30, an unemployed lawyer. She then pointed out that another brand of boxed wine, Black Box, was on sale. “This is just a couple dollars more and you’re going to like it a lot more,” Ms. Ermel recalled telling the woman, who proceeded to return her original choice to the shelf and plop two varieties of Black Box into her cart instead.