How a Siphon Brewer Works
So how does a siphon coffee maker work? Science!
There are two chambers, and the first is filled with water. By heating the bottom chamber, vapor pressure forces the water to rise into the upper chamber. Here it is mixed with the coffee grounds.
The water, now mixed with the grounds, is pulled back down into the lower chamber (thanks to gravity and a drop in pressure, the “vacuum” effect), through a filter which sits at the bottom of the upper chamber, and the bottom chamber in turn fills with brewed coffee.
A bit of science and a bit of drama might just give you the most exciting cup you have had in a while.