The principle of a vacuum brewer was to heat water in a lower vessel until expansion forced the contents through a narrow tube into an upper vessel containing ground coffee. When the lower vessel was empty and sufficient brewing time had elapsed, the heat was removed and the resulting vacuum would draw the brewed coffee back through a strainer into the lower chamber, from which it could be decanted. The Bauhaus interpretation of this device can be seen in Gerhard Marcks' Sintrax coffee maker of 1925.
It’s obvious, but easy to forget: If you don’t clean out your coffee machine’s carafe after each use with soap and water, you’ll always end up tasting a little bit of yesterday’s now-bitter brew. Thermal carafes need to be hand-washed, but all the plastic components of our top picks — brew baskets, lids, etc. — are dishwasher-safe if you keep them on the top rack.

Why it's great: The Magnifica is the lazy espresso aficionado's dream device. It's basically the same thing as having your local coffee shop barista make your drink for you, only you don't have to leave your house or worry about them spelling your name wrong on your cup. Since it's a super-automatic, it pretty much takes care of everything, from tamping, to grinding, to extracting. The only thing you really have to do is fill the containers and push a few buttons. There are so many great features on this thing, with the reheat function being a customer favorite. And the fact that it's able to remember your favorite drink settings? *Chef's kiss.*

Wake up to a perfect cup of coffee with Bunn’s newly designed 10-Cup HB Heat N' Brew Programmable Coffee Maker. For over 60 years Bunn has consistently and reliably brewed great tasting coffee for millions of people in their favorite restaurants and cafes. You can count on the brewing experts at Bunn to help you make the same great tasting coffee at home for your family, friends or just for you. This coffee maker features a digital clock with a programmable brew start time. Heat N’ Brew...
Served in a variety of drinks, espressos are made by machines that send pressurized hot water through finely-ground coffee beans—thus, the quality of the drink is dictated in large part by the quality of machine that brews it. Historically, the best espresso has been brewed in coffee shops with industrial-grade equipment. Today, continued innovation in the at-home espresso brewing industry has led to the creation of high-quality machines that can contend with some of the best baristas out there.
Our brew-performance tests measure the brew temperature and contact time (how long water stays within a sweet spot of 195° to 205° F for brewing). We measure concentration using a refractometer, a device that measures the amount of coffee dissolved in each brew. Our convenience tests look at how easy it is to set timers, fill the reservoir, clean the machine, and more. And for the first time, we’re incorporating predicted reliability and owner satisfaction ratings into the new Overall Score for each model. We determine these ratings for each drip coffee maker brand using survey data collected from thousands of CR members.
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