If you dislike the taste of instant coffee, hate to brew your own, this unique design coffee maker is a simple devise that uses cold water and a carefully designed filter system to produce a exceptionally pure coffee concentrate from ground coffee. This unit is made of pyrex glass on a wooden stand. Cold water brewing extracts the desirable flavor elements, but eliminates many of the undesirable oil and acids found in hot brewed coffee that are not soluble at low temperature. Brewing coffee taste smoother and easier on the stomach, and also been recommended by doctors.