Rinse the Phin filter set with hot water. Set up the base as shown in the photo below.
Place the chamber on top of the lid and add the ground coffee. Shake gently, tamp with the damper, then add a bit more coffee.
Add a little water to the lid below the chamber. Slowly pour hot water over the coffee in a circular motion until absorbed. Let rest for 2-3 minutes.
Next, remove the lid from under the chamber. Add hot water to the chamber. The water should not fill up more than ⅔ of the chamber's capacity. Wait for the coffee to drip into the glass.
Once the coffee nearly stops dripping, press the damper firmly to extract all the remaining coffee.
Pour the condensed milk into a glass. Fill half the glass with crushed ice and gently press the ice down.
Pour the yogurt over the ice.
Pour the cooled coffee with a little crushed ice into a shaker and shake vigorously to create foam.
Open the shaker's lid and slowly pour the foamed-up coffee into the glass.