Bring water to boiling. Steep tea bags in boiling water according to package directions. Remove and discard tea bags. Stir frozen juice concentrate into tea mixture. Cover and chill mixture until serving time. To serve, fill a tall ice-filled glass 1/4 full with the tea mixture. Top with chilled sparkling water or club soda. Garnish with a few fresh berries and lemon wedge. Makes 6 to 8 servings.