Filtering Many connoisseurs consider this the best method for obtaining maximum flavor and avoiding bitterness. An almost foolproof way to make good coffee, this method involves putting coffee grinds in a paper or cloth filter and then running boiling water through the grinds letting the water run through into a container. Whether one simply puts coffee grinds in a paper or cloth filter and then pours boiling water over or uses a more complex machine that automatically boils the coffee and drips it over the coffee is unimportant. What is important is that the container used should be made of glass or earthenware, because contact with metal tends to lower the quality of the coffee. A major advantage of filter coffee is that it can be made in relatively large quantities and then reheated without becoming bitter afterwards.
Filter coffee is also best in making iced coffee or cold coffee.
It is important to remember, however, that the most important taste should be of coffee and not of milk, and it is wise not to use too much milk. Many European cafes have also learned that it is wise to make ice cubes from fresh coffee and to use these instead of plain ice cubes when making ice coffee. Again, keep in mind that whipped cream that has been freshly made is always more appreciated by clients than that which comes from a spray can. Although some of these are acceptable, none are excellent and many feel that they are lacking in flavor and aroma. This is probably due as much to the fact that the containers for this coffee, into which the water must be poured, are made of plastic.