01 - Fill a cocktail shaker with ice.
02 - Add vodka, cranberry juice, lime juice, and simple syrup if using to the shaker.
03 - Shake vigorously for about 10 seconds until well chilled.
04 - Strain into a chilled cocktail glass or pour over fresh ice in a rocks glass.
05 - Garnish with a lime wedge and a few fresh cranberries if desired.