Vacuum Pot Brewing Guide The Steps Pour desired amount of water into the bottom of glass server and place over butane burner. Insert the filter in the funnel and gently secure the hook and chain to the edge of the tube. Grind coffee to fine : 1 Tbsp. per 4 oz. Place the glass funnel on the server and bring the water to a boil. The water in the glass server will rise into the funnel and mix with the ground coffee. Around 2 cm of water will remain in the bottom. Allow the coffee to dwell for 1 minute, extinguish the burner, and let the water extract back down.