A Siphon coffee is brewed using two “glass balloon”. The upper tank is where you put your coffee grounds. The lower coffee pot is filled with water. These are connected with a tube and separated by a filter. When heat is applied on the lower pot, vapor pressure pushes water to the top tank, mixing with your ground coffee. When temperature is decreased, water goes down to the lower pot. Ready to serve.
It was my first time to see how a siphon coffee maker or vacpot works. Simply fascinating!