Most people know the benefits of drinking more water and less soda, but there's nothing wrong with having some soda every now and then with a good meal or just to relax with. Making your own soda ...
You can use a different grapefruit soda, or Liber grapefruit cordial instead of simple syrup. If so, change the grapefruit soda to club soda. In the bottom half of a mixing tin, add the mint and ...