01 - Combine grapes, cold water, sugar, and fresh lime juice in a blender container.
02 - Blend on high speed until completely smooth and frothy, approximately 1-2 minutes.
03 - Pour mixture through a fine mesh sieve or cheesecloth into a pitcher, pressing to extract all liquid and discard solids.
04 - Taste the strained beverage and add additional sugar if desired, stirring until dissolved.
05 - Refrigerate until thoroughly chilled or serve immediately over ice cubes in filled glasses.
06 - Decorate with fresh mint sprigs or additional grapes as a finishing touch.