1 (750 milliliter) bottle sauvignon blanc (or other white wine)
½ cup tequila
1 cup club soda
Lime wedges, for garnish
Muddle the grapefruit, limes and mint in a cocktail shaker then add to a gallon drink container. Pour the agave, grapefruit juice, sauvignon blanc, tequila and club soda to the container and stir to combine.
Refrigerate for at least 2 hours, or until chilled through. When ready to use, pour over ice-filled 8-ounce glasses and garnish with lime wedges.