Begin by washing six fresh limes under running water. Cut each lime into eight equal pieces to release their juices.

In a blender, combine the lime pieces, cold water, and sweetened condensed milk. Blend on high for 30–45 seconds until smooth.

Strain the blended mixture through a mesh strainer into a bowl or pitcher to separate the liquid from solids.

Fill glasses with ice and pour the strained mixture over it, enjoying the vibrant green color and flavors right away.