Brew tea by adding the entire 100g tin of leaves to 12-cup coffee maker's filter basket. Use 12 cups water. As soon as it has brewed, pour into a pitcher and refrigerate until very cold. (This is double-strength.).
In a bowl, mix peaches, sugar and raspberry syrup. Refrigerate until peaches are thawed and sugar is dissolved. Stir frequently.
To make tea:
Fill a glass with ice. Add some peaches and 2-4 Tablespoons of syrup over ice. Fill glass with cold tea and top with a few fresh raspberries. Stir and enjoy!