GROSCHE Heisenberg Glass Vacuum Syphon Coffee Maker 700 ml The Heisenberg Syphon coffee maker by GROSCHE has a unique design that looks beautiful in any home or office Heat resistant borosilicate glass construction is light weight, safe with open flames and durable. It can be used with aftermarket burners, as well as with the included alcohol burner (flammable fuel not included) Package Includes Alcohol Burner (without flammable fuel) and Scoop The Syphon Coffee maker is for true coffee -perfectionists. It is not the most easy to use coffee maker, but it gives you a unique control over the coffee breing process, and smooth flavor. It Brews 3 cups of coffee to perfection in only 10 minutes