Unscrew the top screen of the Vietnamese coffee filter. Add coffee; screw screen back on tightly. Set filter over the cup.
Fill the filter 1/4 of the way with boiling water. Wait until it passes through the filter, about 30 seconds. Loosen the top screen slightly. Fill the filter with boiling water. Cover with lid and wait until has passed through the filter, about 5 minutes. Remove filter.
