A few fresh mint sprigs
Combine sugar syrup and tea decoction in a jar and squeeze one lemon in it. Stir to mix.
Take lots of ice cubes in a jug. Thinly slice the cucumber vertically with a peeler into it. Tear fresh mint sprigs and add. Slice the lemons and add.
Add the tea decoction mixture and mix well.
Pour the drink into 4 individual tall glasses and serve chilled.