Whatever Nespresso espresso machine you choose, every model works by the Nespresso system. The Nespresso system is unique because it is based on a hermetically sealed capsule, which contains the precise amount of freshly roasted and ground coffee needed to make the perfect cup of espresso. These capsules help to lock in all of the coffee aromas, preserving them perfectly until the espresso is brewed and ready for drinking. Nespresso offers a range of 23 premium coffee blends. There are two different ranges of capsules in the Nespresso blends namely Espresso and Lungo.