01 - Combine grapes, water, sugar, and lime juice in blender container.
02 - Blend on high speed until completely smooth and frothy, approximately 1-2 minutes.
03 - Pour mixture through fine mesh sieve or cheesecloth into pitcher, pressing firmly to extract all liquid.
04 - Test sweetness level and add additional sugar if desired.
05 - Refrigerate until thoroughly chilled or pour immediately over ice in glasses.
06 - Top with fresh mint sprigs or additional grapes as preferred.