Add vodka, cranberry juice, lime juice, and simple syrup to the shaker.
Shake vigorously for 10-15 seconds until well chilled.
Fill a highball glass with fresh ice cubes.
Strain the mixture into the glass.
Top with club soda (about 1-2 oz).
Stir gently with a bar spoon to combine.
Garnish with fresh cranberries and a lime wheel.
Notes
The cocktail works best with 100% cranberry juice rather than cranberry juice cocktail for a more natural taste.Store any leftover simple syrup in an airtight container in the refrigerator for up to 2 weeks.For a mocktail version, replace the vodka with additional cranberry juice or sparkling water.The drink can be made ahead in larger batches - just add the club soda right before serving.