Chill martini glass by either placing into the freezer, or by filling your cocktail shaker with water and ice, and pouring the water and ice into your martini glasses.
Allow the glasses to chill for a couple of minutes before discarding the water and ice. Into the cocktail shaker add 1 cup of ice, Opal apple juice, vodka, and caramel syrup. Place lid on cocktail shaker and shake vigorously for about 30 seconds. Strain into a chilled martini glass. Garnish with a slice of Opal Apple if you desire.