NOTE: This was done in a Vitamix blender. If you have a common household blender, I don't recommend this recipe. You definitely need something high-powered for this.
Pour the melted grape concentrate into the blender first.
Then add all other ingredients with the ice on the top and blend until smooth. Add water as needed to blend smoothly.
Storage: This will keep for up to 3 days in the fridge. Simply shake or stir before drinking.
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.