This testing was designed to highlight the difference in how each machine extracted its coffee grounds. Remember, extraction is tied to water temperature, how long the grounds had to steep, and how evenly that water is distributed in the brew basket. (Depending on how the machine distributes the water and the shape of the basket, any particular ground may or may not receive the same amount of time in contact with water — thus any individual grind may be over-extracted, under-extracted, or just right.) Properly extracted grounds would have a balance of notes and aromas, from slight hints of acid to a pleasant amount of bitterness.
The method for making coffee in a percolator had barely changed since its introduction in the early part of the 20th century. However, in 1970 General Foods Corporation introduced Max Pax, the first commercially available "ground coffee filter rings". The Max Pax filters were named so as to compliment General Foods' Maxwell House coffee brand. The Max Pax coffee filter rings were designed for use in percolators, and each ring contained a pre-measured amount of coffee grounds that were sealed in a self-contained paper filter. The sealed rings resembled the shape of a doughnut, and the small hole in the middle of the ring enabled the coffee filter ring to be placed in the metal percolator basket around the protruding convection (percolator) tube.
If you push the 54mm stainless steel portafilter into the hands-free grinding cradle, the grounds will go right into the filter. The grinder shuts off when it's done, too, so you don't have to worry about figuring out if you've got the right amount. Finally, the included 54mm tamper ensures that your grounds are evenly pressed, so you get the most out of your beans.
Try a new way to brew coffee if you’re tired of the same-old, same-old. We offer a variety of ways to brew up tasty hot beverages to fill your favorite coffee cup. Choose from standard drip machines with high volume carafes or durable thermal carafes. Pour-over brewers come in manual and automatic versions to create fast, hot cups of java goodness. Automatic versions heat water to industry standards in mere seconds and allow plenty of contact between hot water and beans to develop the coffee essences you love. Manual pour-over brewers have everything you need but the hot water to make your own coffee wherever you are. Order a teapot or automatic kettle to make quick cups of coffee without waiting for a machine to brew it for you. Go retro with a siphon-style coffee maker. You never have to use the stove for the electric versions of siphon brewers. A flip of a switch starts the process. Hot water vapor pushes through the top of the appliance to soak the ground coffee beans, and then the brew slowly drips back down into the carafe for a perfect cup of coffee.