Begin by washing four fresh limes thoroughly under cool running water to remove any residue. Cut each lime into eight wedges.

In a high-powered blender, combine the lime wedges with three cups of cold water and one cup of sweetened condensed milk. Blend on high for about 30-45 seconds until smooth.

Place a fine-mesh strainer over a large pitcher and pour the blended mixture through it, pressing down to extract as much liquid as possible.

Fill tall glasses with ice and pour the creamy lime mixture over the ice. Garnish with a lime wheel or sprig of mint.