01 - Place grapes, water, sugar, and 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 firmly to extract all liquid while removing skins and solids.
04 - Taste the beverage and add additional sugar or lime juice as needed to achieve desired sweetness and balance.
05 - Refrigerate until thoroughly chilled or pour immediately over ice cubes in filled glasses.
06 - Decorate each glass with fresh mint sprigs or additional whole grapes if desired.