The AeroPress is a simple method for brewing one or more cups of coffee directly into your cup. Water and grounds are mixed together for about 10 seconds. Then, by pressing down on the AeroPress, the mixture is pushed through a micro filter, using gentle air pressure, into the waiting cup.The brewer produces a concentrate and the cup should be topped up afterward. If you prefer espresso concentrations do not add additional water. Total brew time is 30 seconds. Manufacturer recommends water temperature in the 165 - 175 range.