- Also called: vacuum pot
- Availability: Rare find
A siphon (or vacuum pot) brews coffee through a vapor-pressure cycle: a heat source under the lower bulb pushes water up through a tube into the upper chamber holding ground coffee, the brew steeps, and when the heat is removed the cooling lower bulb creates a vacuum that pulls the brewed coffee back down through a cloth or paper filter. It is a theatrical method, common at high-end Japanese kissaten and a small handful of Brooklyn specialty bars that keep one as a feature brewer.