The siphon is a fancy and flashy coffee maker. It can be a fun way to make coffee and impress friends at the same time, they are a little high maintenance.  We don't recommend them for simple coffee fans. 

Originally invented in Germany in the 1840s. Coffee grounds are added to the upper vessel and vapor pressure forces hot water up to immerse the coffee. Once the heat is removed, gravity pushes the brewed coffee back through a filter into the bottom vessel.

Common brands include Hario, Yama and Bodum. You can also find some really cool custom designed siphon coffee makers on websites like Etsy.