Add all ingredients except for sparkling water to a blender and blend until smooth.
Add ice to ~12 ounce glass of choice. Fill glass halfway with the cranberry mixture. Top off with sparkling water and repeat for each drink you are making. Garnish with rosemary if desired.
Notes
This makes 2-3 drinks depending on glass size. You can make more drinks by doubling the recipe or by diluting the drink further with the sparkling water.