Once the mixture has cooled, strain it, pressing on the cranberries to extract as much liquid as possible. (Discard the cranberries or save them for another use.)
Add in 2 ounces of cranberry simple syrup and 2 ounces of white rum and stir.
Top with ice cubes, and 2 ounces of sparkling water.
Garnish with a few mint leaves, fresh cranberries and a slice of lime. Enjoy!
Leftover cranberry simple syrup can be stored in the refrigerator for 2 weeks.
Photos by TheFrayedKnot.com