You gonna pick McDonald's instead because the Five Guys burger box is cheaper and doesn't function quite as well? Should we take your still choosing Five Guys as a sign that you prefer that box?
No, you cannot pick out the preference for one component of the offering that way. If there'd been a 5-cents-higher option with the better box, they might have chosen that. You can only compare the entire offerings—convenience, quality of all components combined, cost, customer service, and so on, and say that that entire bucket was what they preferred to the other entire bucket.
Well, with non-diversified commodities, in a market with instant arbitration and universal complete knowledge about the products the Econ 101 models work.
> the revealed preferences of consumers for those things is the cheaper version, not the better version.