Boil 1 cup of water. Warm a phin filter and a heatproof glass with a little of it. Add 4 teaspoons of ground coffee to the filter and screw the press on until snug.
Pour in a little water to wet the grounds and let them bloom. Fill the filter with the remaining water and let it drip through, about 3-5 minutes.
Stir in 2 teaspoons of sweetened condensed milk. Cool slightly, then pour into a glass filled with ice.
