And Other Great Things You Can Do with Wine at the Reception Who doesn’t love wine at a wedding reception? With that in mind, how much wine do you need to purchase and what kinds? How much to buy is probably the easier question to answer than what kind. Once you know how many wine lovers will be there, you’ll be able to determine how much to purchase. Make sure the wine glasses, or disposable cups, are a 5 oz serving size. People usually fill the glasses half full so it would be an 8-10 oz wine glass. Typically guests