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.
The Bonavita is a simple, compact machine (about 12 inches x 12 inches) for only $190, and it makes coffee that ranked in the top three in our taste test. Its philosophy seems to be “everything you absolutely need, nothing you don’t.” That means it’s SCAA-certified for water temperature and brew times, boasts pre-infusion capabilities, and has a flat-bottom filter basket that extracts grounds evenly. That’s it.
Expert reviewers and buyers alike love this espresso machine. BravoTV wrote a review explaining why it's worth the money even though it's pricey. Indeed, when you do the math to calculate just how much money you spend over the course of a year on espresso, cappuccinos, and other high-end coffee drinks, you'll see just how much money this admittedly expensive machine will save you in the long run.
The next is the machine’s auto-pause. If you remove the carafe before your full pot is done brewing, the flow will stop until the carafe goes back in. It’s not a perfect system. There are a few inevitable drips that add an extra step to clean-up, and if the water is held up in the brew basket for too long, it increases the chance of over-extraction. But if you want a great first cup to sip on while the rest of your pot is brewing, you’ll get it in a much more satisfying time frame.
The Mr. Coffee DRX5 coffee maker gives you the advanced action to delay-brew your coffee, enabling you to wake up to coffee waiting for you. The auto pause and grab a cup option allows you to get a cup of coffee before the brew cycle is finished, with the machine halting the brewing process so you can pour a cup and then complete the process once you reinsert the carafe into the chassis.