Start by washing the three limes and cutting them into quarters.
Combine the lime quarters with three cups of water in a blender and blend for 30 seconds.
Strain the blended mixture to remove the pulp. For a smoother texture, you can strain it a second time.
Return the strained lime water to the blender.
Add a handful of ice and the sweetened condensed milk to the blender.
Blend again until the mixture is creamy.
