The resisting heating element is made of coiled wire that gets hot when you turn on the machine. Sandwiched between the warming plate and aluminum water tube, the resisting heating element is designed to distribute heat efficiently. It serves two functions: heating water poured into the reservoir and keeping the coffee warm once the coffee is made. Espresso, however, is a single ounce versatile ingredient that can add flavour to any dessert or beverage. Espresso extracts can also be used for ice cream and bakery goods. Remember though, that espresso machines may only be used with espresso beans. Using any other coffee roast will result to a substandard coffee taste. Keurig Elite B40 Home Brewer - If you love "K-cups, the Elite B40 is a gourmet single-cup coffee maker that whips up coffee in 45 seconds. It has two cup size option: small mug which is 7.25 ounces and large mug which is 9.25 ounces. Coffee lovers prefer to "K-cup" brewers because it is easy to clean. You can find various coffee pod brewers in the market which are made by different manufacturers. The second one is the tassimo brewer. In this type, it needs t-discs to work to prepare your beverage of a coffee. You will find this disc in two kinds, the bosch and the braun tassimo discs. And, finally, the k-cup brewers. Brewed coffee is prepared by this kind of coffee machine with the grinder grinding the beans and then the brewing chamber brewing the ground coffee beans. If you prefer this coffee maker, expect coffee ground remains to be discarded into the tray which of course you would have to empty to clean the appliance. Large coffee shops use espresso machines with at least three heads, however only one espresso head is necessary for household use. Espresso coffee makers are specifically designed to use espresso beans only. Any other beans used on the espresso machine may give unpleasant results. An espresso head is attached with a portafilter that serves as a mini filter basket, as with the drip machine.