Captain's wine cellar

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The Captain's wine cellar was the term USS Cantabrian commanding officer Noel Turner labeled the collection of wines and champagne he had aboard for diplomatic functions.

In 2372, Turner told Cantabrian counselor Scott Fack they would have to try a bottle from the Captain's wine cellar if Turner recovered from CACS. Fack, in turn, asked if the wine cellar was in the Cantabrian's basement. (Star Trek: The Cantabrian Expeditions: "Isolation")

One would assume the "wine cellar" would be an actual room on the ship, storing wine and other bottled drinks for special occasions.