DIY Pomegranate Grenadine

From Serious Eats.
Ingredients:
2 cups pomegranate juice
1 1/2 cups sugar
4 tablespoons (2 fluid ounces) pomegranate molasses
2 teaspoons rosewater

Heat pomegranate juice on medium for 5 minutes, then add the sugar and stir to dissolve. Continue to cook until the two integrate into a syrup, about 5 more minutes. Then add the pomegranate molasses and cook for an additional 2 minutes, stirring to dissolve. Remove from heat.
Let mixture cool to room temperature, then pour into glass container. Add rosewater, seal, and shake. Refrigerate and use as soon as its cool, or store in refrigerator for up to one month.
Yield: A little over 2 cups.