Stove Top Espresso Makers are sometimes known as "Moka Pots", and are similar to espresso makers. The coffee they produce has the same extraction ratio as an espresso machine. They differ from regular espresso and coffee makers in that they use steam and boiling water above 100 degress celcius compared to 92-96 degress with espresso machines. This higher temperature allows it to extract more caffeine an flavour than traditional equipment.
Bialetti Stove Top Coffee Makers make coffee by boiling water in the bottom chamber (A), which causes it to rise through the midle chamber where the coffee is held (B) and finally ends up in the top chamber (C). They are literally placed on top of a stove as a source of heat.
Because it uses no electricity and has no disposable parts (it uses a metal filter), these are perfect for making coffee while on camping trips.
Moka pots require that the rubber seal be examined and replaced every few months to ensure a precise fit. The safety valve should also be checked to ensure that it is not blocked. It should be thoroughly washed with hot water, but without soaps or detergents.
They are sometimes known as Macchinettas, meaning "little machine" in Italian.