To make Hibiscus Tea Simple Syrup, mix sugar and water in 1-quart saucepan. Heat to boiling over medium-high heat, stirring until sugar dissolves. Remove from heat. Add tea bags; steep 5 minutes. Remove and discard tea bags; set aside 1 hour to cool. Transfer to a storage container. Cover container, and refrigerate up to 1 week. Makes 1 1/2 cups.
To make cocktail, add 2 tablespoons simple syrup to a champagne flute. Top with champagne. Garnish with raspberries or lemon twist.