For the tea:
4 berry-hibiscus herbal tea bags (recommended: Celestial Seasonings Red Zinger)
4 cups water or seltzer
1/2 cup simple syrup or to taste
1/2 orange, cut into wedges
1/2 lime, cut into wedges
8 frozen raspberries or strawberries
For the simple syrup:
1/4 cups sugar
1/2 cup water
1/4 teaspoon vanilla extract
Put tea bags in a heatproof pitcher.
In a saucepan bring water just to a boil and pour over tea bags. Steep tea 5 minutes and remove tea bags. Cool tea and chill, covered, until cold, about 1 hour.
Stir in simple syrup, to taste. Squeeze orange and lime wedges into tea and add wedges. Serve tea in tall glasses. Garnish with frozen raspberries.
To prepare the simple syrup:
Add sugar and water to a microwave safe bowl. Microwave for 1 minute; stir until sugar is completely dissolved. Let syrup cool.