Spread the strawberries and raspberries in a single layer on a baking sheet lined with parchment paper. Freeze for 2 hours. Remove the berries to a resealable plastic freezer bag and place back into the freezer.
In a large pitcher or punch bowl, combine the apricot nectar, ginger ale, grape juice and vodka; mix well. It's okay to let this mixture chill in the fridge until you are ready to serve it. Add the seltzer and frozen berries when you are ready to serve; pour into glasses or ladle into punch cups.
Notes
Leave out the vodka for a refreshing summery drink without alcohol!