Expensive wine is not always good, cheap wine is not always bad. One of my favourite wines is a ten bucks a bottle; it&#x27;s more expensive for me now because I need to order it by the case and ship it across the country to get it, but so it goes.<p>If somebody brings a bottle of wine to dinner, unless you specifically planned the meal to go with a specific bottle of wine (or if they specifically say that this bottle is meant to be opened at a certain time or for a certain occasion), open the bottle they brought. Otherwise, you&#x27;re sending one of two messages:<p>1) I&#x27;m certain that this wine you brought as a gift is so bad, I don&#x27;t even want to bother drinking it.<p>2) I&#x27;m certain that this wine you brought as a gift is so good, I don&#x27;t want to share it with you at all.<p>Neither message is a good look. If it&#x27;s bad wine, open it, share the bad experience, and joke about how horrible the wine is. You&#x27;ve all learned something. If it&#x27;s good wine, open it, share the good experience, and marvel over how great the bottle is.