"Another bottle of wine, please!"
Translation:Noch eine Flasche Wein, bitte!
Well, I am not a native speaker of German, but from the perspective of a case-based language it looks the most logical way to treat this.
For example, "Good morning" is "Guten Morgen" because it is actually "(I wish you a) good morning". Obviously, in Nominative "a good morning" is just "ein guter Morgen"
Here is another sentence, this time "Another one, please": https://www.duolingo.com/comment/1441951
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