Pour the contents of the sachet into a glass and top up the concentrate with 250 - 400 ml of water (1/2 liter of water is also fine).Add ice cubes, stir and a wonderfully refreshing iced tea is ready.
Depending on your personal taste, you can use more or less water. Either still or carbonated.
Topped up with wine or Prosecco instead of water, you can mix yourself an extraordinary and stimulating spritz... Salute!