- In a saucepan, combine the sugar, zest and juice. Bring to a boil. Remove from the heat and stir until the sugar has dissolved. Pour into a pitcher and refrigerate for about 2 hours. Strain if desired.
- Just before serving, add the mineral water to the citrus syrup.
- Put 3 ice cubes in each of 6 highball glasses. Partially fill the glasses with the syrup mixture, then top off with red wine, pouring gently to create two distinct layers. Stir before drinking.