The boiling method takes a leap forward with the upside-down percolation system for coffee prepared at home. The first coffee percolator to use this system was patented in France in 1819, but it was in Italy that it achieved incredible success: it is no coincidence that this is known throughout the world as the Napoletana (or Cuccumella). It was possible for the first time to heat the water and create the infusion using just one device.
After the water is poured into the bottom, the perforated filter filled with coffee is added and the top part screwed down. The Napoletana appears to have the spout facing downwards, but this is misleading: when the water boils, the heat is turned off and the pot is flipped over. Gravity then takes the boiling water through the filter and creates the infusion. After a few minutes, the coffee is ready to serve.