It may draw disdain among hardcore coffee aficionados, but the home-made espresso from a moka pot is now an institution in its own right among millions of coffee lovers. Originally called a caffettiera or moka, the device started its triumphal march around the world from Italy in 1933, when Alfonso Bialetti created the “Moka Express”, an octagonal aluminium pot for preparing espresso on the home stove. Nowadays, espresso makers are available from other manufacturers in a range of designs and not only made of aluminium, but stainless steel and even porcelain, to the chagrin of the purists. “Str…