Brewing instructions.1. Fix the filter cloth to the filter head of the siphon, and then put it into the brewing flask (glass). Insert the other end firmly into the vacuum bottle (can). Ensure that the seal is secure.2. Add about 40 grams of medium-fine coffee grounds to the brewing bottle. Depends on likes.3. Unscrew the vacuum bottle stopper. Pour 400 to 450 cc of cold or warm water using the measuring cup provided. Tighten the plug by hand and ensure a good seal.4. Press the balance bar to raise the vacuum bottle. Open the cover of the burner fire extinguisher completely. Put down the vacuum bottle and rest the fire extinguisher cap on it. Light the burner and wait.5. After sucking all the brewed coffee back into the vacuum flask, loosen the top stopper to break the vacuum of the flask. Coffee is supplied through the tap.