Pineapple gives this sangria a tropical twist.
Cut half of the pineapple into 3/4-inch-thick spears and the other half into 1-inch chunks. Transfer all pineapple to a pitcher, and add plums. Sprinkle with sugar, and stir to combine. Add Cointreau and brandy; let sit at least 1 hour at room temperature. Stir in wine, pineapple juice, and sparkling water. Sweeten with more sugar, if desired, and serve chilled.