Pour the grapefruit and lime juice into your shaker
Add the maple syrup, apple cider vinegar (or non-alcoholic tequila) and sea salt
Add 3-4 cubes of ice
Replace the lid and shake for about 15-20 seconds until the shaker is cold and ingredients are well combined
Strain over fresh ice into a tumbler
Top with soda
Garnish with salt or Tajin rim and lime slices
Serve
