Didn't seem to find any mention of it when I searched "wine glass"... Odd.
I want to put wine glasses on the table and be able to pour more wine into them while they're still on the table. I can't imagine hassling people with wine if I were to have a feast or casual pixel meal. My Barbarism/Civlization belief is fully towards barbarism, but storing filled glasses in a crate is crossing the line. I may be barbaric, but I'm not an animal!
I dunno where it would fit best. With the food or with the dishes would be obvious options, or perhaps that blank area at the top-right part of the table (window) could gain a few grid spots for wine glasses. To keep it aligned with the other grids, it could be an extension of the one with the dishes, but the 2x2 additional spots could have a different background colour and only allow wine glasses (or perhaps other usable drinking ware).