4 limes, washed and cut into wedges
4 cups cold water
1/2 cup sugar, or to taste
1/2 cup sweetened condensed milk
2 cups ice
Place the lime wedges, water, and sugar in a blender
Pulse briefly 4 to 5 times
Strain the mixture into a pitcher
Add the sweetened condensed milk
Stir until well combined
Add the ice
Serve immediately