With the AeroPress coffee maker, total immersion brewing results in uniform extraction of the ultimate in full coffee flavor with lower acidity and no bitterness. Other coffee makers drip hot water on a bed of grounds, over extracting at the center and under extracting at the edge. Micro filtered for grit free coffee. One minute from start to enjoy. The actual press time takes only 20 seconds. Makes 1 to 4 cups. Made in USA.