As far as I know, this is the world's smallest functional siphon. It's called the Miniphon from Hario, and brews barely 100mls of coffee. I uploaded this before, but this picture is tightened up a bit with most dust removed.
Camera: Canon 5D Mk II
Lens: Canon 24-105 f4 L lens
Shot at 93mm, f18, 1/20th a second
Three softboxes, reflectors used.
More details here: www.flickr.com/photos/coffeegeek/4116594405/meta/