1Stir white wine, rum, orange juice, and sugar together in a large pitcher until the sugar is dissolved; add apple, lemon, and lime slices. Gently stir lemon-lime soda into the wine mixture.
2Put frozen grapes into serving glasses and pour sangria over the grapes.
Footnotes
Cook's Note:
The flavors in this will intensify if refrigerated overnight before adding the soda, but it's not necessary.