To make chamomile syrup: steep 1 tbsp dried chamomile in 1/2 cup hot water for 5 minutes, then stir in 1/2 cup sugar until dissolved. Cool before using. Adjust sweetness and acidity to taste; add more soda for a lighter drink. Best with fresh grapefruit juice. Serve with light snacks. Syrup keeps in fridge for up to a week.