- 6 cups cold water
- 4 limes, washed and quartered
- 1/2 to 3/4 cup sweetened condensed milk
Combine the water and limes in a blender, in batches if necessary, and blend until totally smooth, about 2 minutes. Strain the lime mixture through a sieve and press on the solids until only the pulp remains.
Pour the liquid into a pitcher and add the sweetened condensed milk to taste. Cover and refrigerate until cold. Serve in glasses over ice.