A portafilter (or group handle) attaches to the grouphead of semi-automatic and piston-driven espresso machines, and carries a tamped puck of coffee grounds within its basket. It is usually made of brass for better heat retention, and is attached by a plastic or wooden handle. The portafilter forms a seal with the espresso machine's gasket, and directs high-pressure hot water through the coffee puck. After-market retailers also sell bottomless portafilters that minimize the espresso's contact with any metal. A bottomless portafilter is one tool baristas use to analyze the quality of the coffee grind and the evenness of the extraction and allows for a visual check of "channeling" or the condition in which water is able to pierce a hole in the espresso puck during the brew process leading to poor extraction. Often, baristas use knockboxes to store their spent espresso grounds after they have pulled a shot.
The best part about this machine is that it comes with everything you need (except the beans). You don't have to spend an extra $100+ on a good grinder or $25-$100 on a milk frothing pitcher and tamper. You will pay a bit more for it than other machines on this list, but it's well worth it — especially now that this machine costs $548.96 instead of $999.99.
The Mr. Coffee Optimal Brew coffee maker System has a highly modular design, with its rectangular water reservoir easily sliding in and out of the chassis. For those who only want a cup of basic coffee, you will find that the Mr. Coffee Optimal Brew coffee maker System will do that very well – its "brew now" button is found on the front of the machine.
At the beginning of the twentieth century, although some coffee makers tended to uniformity of design (particularly stovetop percolators), others displayed a wide variety of styling differences. In particular, the vacuum brewer, which required two fully separate chambers joined in an hourglass configuration, seemed to inspire industrial designers. Interest in new designs for the vacuum brewer revived during the American Arts & Crafts movement with the introduction of "Silex" brand coffee makers, based on models developed by Massachusetts housewives Ann Bridges and Mrs. Sutton. Their use of Pyrex solved the problem of fragility and breakability that had made this type of machine commercially unattractive. During the 1930s, simple, clean forms, increasingly of metal, attracted positive attention from industrial designers heavily influenced by the functionalist imperative of the Bauhaus and Streamline movements. It was at this time that Sunbeam's sleek Coffeemaster vacuum brewer appeared, styled by the famous industrial designer Alfonso Iannelli. The popularity of glass and Pyrex globes temporarily revived during the Second World War, since aluminum, chrome, and other metals used in traditional coffee makers became restricted in availability.

As legend has it, Ethiopian goats were the first to discover the delightful properties of coffee beans when they ate the raw beans right off the stem. The goats nibbled happily away at the beans, probably right around 2 o'clock every afternoon, until finally an astute goat herder noticed the goats' perky behavior, gave the beans a taste, found them quite stimulating, and rushed them off to the nearest monastery.
"I've wanted an espresso machine for a while now but just don't have the room for it. I started researching the Nespresso line and wasn't sure how I'd like it at first. I am not usually a fan of pod style coffee machines and was worried about how well this would perform. I got the Pixie model because I don't have a big kitchen and this thing takes up barely any space on my counter. The water heats up quickly so in less than a minute you can have a cup of espresso. As other people have mentioned, it is kind of loud but it is only for a few seconds and doesn't seem to disturb anyone else in my house. The few seconds of noise is worth it for me to have a delicious latte a few minutes later. There is a little box that collects the pods (up to 10 I think) for easy disposal. I also feel like the Nespresso pods have a much better flavor that other pod coffee. If you want a quick espresso and don't have a lot of space for a machine then I highly recommend the Pixie. I am very happy with it and use it daily."
Before we get into the technical aspects of the two types of espresso machines, here’s what you really need to know. Semi-automatic espresso machines are going to be perfect for the espresso connoisseur. If you’re the type that really wants to get the best-quality and taste out of your espresso machine and don’t mind taking a little more time and effort out of your schedule, the semi-automatic espresso maker is going to be for you. It’s a little bit more work, but the key here is that you ultimately have more control over every subtle nuance that goes into your version of the perfect shot of espresso with a semi-automatic.
CR’s take: Though this Bialetti lacks typical drip-machine features such as programming and brew-strength control, it more than compensates with a Very Good rating in our brew performance test and a crisp 8-minute brew time. If you’re the type who sometimes prefers a morning shot of espresso to a cup of joe, this twofer—drip machine beside espresso maker—may be for you. It features a built-in milk frother, a permanent coffee filter, and auto-shutoff. CR does not yet have enough survey data on Bialetti machines to rate them on reliability and satisfaction, but when we do, we’ll add that info to our ratings.