double magnum
/ˈdʌbəl ˈmæɡnəm/
noun
- A very large wine bottle that holds 3 liters (the equivalent of four standard 750 ml bottles).
- A double-magnum is often used for special occasions because it impresses guests.
- The restaurant's wine list included a double-magnum of Bordeaux from 2005.
- They celebrated their anniversary with a double-magnum of champagne.