Espresso and Lungo are the two main coffee extraction sizes used with the Original system. An Espresso is a 40 mL shot of coffee (small cup button) and contains coffee of a finer grind. A Lungo is a 110 mL shot of coffee (the large cup button). The Lungo capsules contain coffee of a coarser grind. If you enjoy a range of extraction sizes and coffee styles, the Vertuo system could be your ideal solution. To discover how you can enjoy five different cup sizes, click here < https://www.Nespresso.com/au/en/vertuo-coffee-capsules>. Extracting at the recommended level prevents over-extraction. You can find out more about this, below.