In a cocktail shaker, add grape juice, raspberry syrup, pomegranate juice and (vodka) if adding and ice. Shake until combined and then strain into a glass. Garnish with raspberries. Stir before drinking.
For raspberry syrup
Place sugar and water in a saucepan and heat over medium heat, stirring until sugar is dissolved. Remove from heat and let cool slightly. Add raspberries and mash them up good! Strain mixture.