Bialetti's 1933 moka pot put the espresso bar's physics in every kitchen

In 1933 Alfonso Bialetti, an aluminium worker in the small town of Crusinallo, had his famous accidental eureka: watching his wife use a lisciveuse — a laundry boiler that pushed boiling water up a central tube — he saw the same physics applied to coffee. The moka pot works with no motor and no electricity: water boils in the lower chamber, the steam's pressure forces it up through the coffee grounds and into the upper chamber, delivering a small, strong, espresso-like coffee at stove-top cost.

The design was eight-sided, all-aluminium, and so right that it barely changed for ninety years. Production started at about 10,000 pots a year by hand in the late 1930s; the boom came after World War II when Bialetti's son Renato, back from a German POW camp, rebuilt the factory and in the 1950s reached some 18,000 pots a day — about four million a year, with the mustached 'Omino' mascot (1953) turning the pot into Italy's most recognisable kitchen object.

The moka became a national institution: a 2010 study cited roughly 90% of Italian households owning one, and by the industry's own accounting the Crusinallo works alone produced close to 300 million pots before closing in 2010. Bialetti listed in Milan in 2007 and, like many icons, later stumbled into debt — but the 1933 pot remains the design that democratised espresso.