01 - 
                Pour a small amount of salt or Tajin onto a shallow plate. Rub a lime or grapefruit wedge along the outer rim of the glass, then dip the moistened rim into the salt or Tajin and apply gentle pressure.
              
              
              
                02 - 
                Add grapefruit juice, lime juice, maple syrup, apple cider vinegar, and a pinch of sea salt into a cocktail shaker. If unavailable, use a mason jar or any container with a secure lid.
              
              
              
                03 - 
                Add 3 to 4 ice cubes. Secure the lid and shake vigorously for 15 to 20 seconds until the shaker feels cold and the mixture is thoroughly combined.
              
              
              
                04 - 
                Strain the beverage into a tumbler filled with fresh ice. Top with plain or grapefruit soda if desired. Garnish and serve immediately.