Blend the Base: Add 6 cups of cold water, 5 lime wedges, and 1/2 cup of granulated sugar into your blender. Blend on high for about 30-45 seconds until smooth.

Strain the Mixture: Use a fine mesh strainer over a bowl and pour the blended mixture to catch pulp. Press down to extract the liquid, leaving a smooth lemonade.

Add Creaminess: Rinse the blender, return the strained juice, and add 1/4 cup of sweetened condensed milk. Blend on high for another 30 seconds until frothy.

Serve and Garnish: Fill tall glasses with ice, pour the creamy lemonade over, and garnish with lime slices on the rim.