16 oz POM wonderful, or 100% pomegranate juice
16-18 oz sparking mineral water (I used lime flavored)
1/2 cup berry simple syrup: (3/4 cup blueberries, 1 1/4 cup blackberries, 1/2 cup sugar, 1/3 cup water)
Ice

First make berry simple syrup. In a medium saucepan, combine all ingredients and stir over high heat until all the sugar is dissolved and the mixture is boiling. Reduce heat to low, and simmer for 30 minutes, uncovered. Remove syrup from heat, strain to remove solids (save for a later use, if desired), and cool before using. To make spritzers, add ice (about 3/4 cup) to a medium tumbler; add 8 ounces of POM or pomegranate juice, about 2 tablespoons berry simple syrup, and about 4 ounces of sparkling mineral water. Stir to mix and drink cold.