Blackberry-Lime Agua Fresca

Refreshing blackberry-lime Agua Fresca is sure to appeal to both adults and children. Instead of water, use soda to make the drink sparkling.
Combine 12 ounces of fresh blackberries, powdered sugar, and lime juice in a blender until smooth (about 30 seconds). Pour the mixture through a fine mesh sieve into a large jug, using the back of a spoon to squeeze out the juice. Remove the pulp and seeds. Add chilled water or soda. Decorate if desired.