Mypressi Twist Portable Espresso Maker Perfect for home, office, or outdoors, Twist portable espresso maker requires no external power, levers, dials, or power cords Uses same 100-percent recyclable and affordable 8g pressure cartridges used in whipped cream dispensers and soda makers Each cartridge has sufficient pressure to make up to 4 double shots and 8 single shots of espresso High temp stability ensures espresso is extracted at perfect temp; pressure engine ensures soft pre-infusion and build up for ultimate in smooth-tasting coffee Stylish, award-winning, patent-pending design; easy to clean without requiring special tablets or complex cleaning procedures; just rinse