WACACO Nanopresso Portable Espresso Maker Bundled with NS Adapter, Compatible With Ground Coffee &*Nespresso®* Capsule, Travel Coffee Maker, 18 Bar Pressure, Manually Operated, For Camping[SUPER PUMPING SYSTEM] Built around a newly patented pumping system and no battery electric need, the Nanopresso is powerful. With the help of your hands, a maximum of 18 bars (261 PSI) of stable pressure is created during extraction for unparalleled coffee. It is more than what most home espresso machines can deliver. [EASIER THAN EVER] The Nanopresso works best with all varieties of ground coffee. Add the boiling water to its tank and pump manually,