'Wine' is an uncountable noun, the phrase 'a wine' is grammatically incorrect. It should be 'some wine'.
We're changing it to a bottle of wine since that more closely matches the Danish meaning in common usage :)
(but will also accept some wine)
Edit: After some more research, we will now accept all of the above plus "a wine" in the meaning of a specific kind of wine. This matches the meaning in both languages.