Cut a fresh lime or lemon into two equal slices with a sharp knife.
Pick one of the lemon or lime slices and rub it along the rim of your old-fashioned cocktail glass.
Note: You can use any other cocktail glass if you do not have an old-fashioned cocktail glass.
Dip the wet rim of your cocktail glass in salt and set it aside until you make the Salty Dog Cocktail.
Fill a cocktail shaker with ice cubes or cracked ice. Pour in 3 ounces of vodka or gin and 6 ounces of the freshly squeezed grapefruit juice.
Note: If you do not fresh grapefruit juice then you can use the packet one as well.
Shake the cocktail shaker for 10 to 15 minutes until both of the liquors mix well and chill properly.
Note: Continue shaking until water drops appear on the outer side of the cocktail shaker.
Strain the grapefruit-vodka mixture in the rimmed old-fashioned cocktail glass.
Garnish your drink with a lemon or lime wedge and serve. Happy summer sipping with delicious Salty Dog Cocktail!