Alessi La Cupola Espresso Maker. For a strong coffee, please fill the filter with medium ground coffee and make a small cupola that slightly protrudes beyond the rim. Do not press down. For the best and strongest coffee, please heat at low heat for about 10 minutes, never allowing the coffee to boil. In Italy, they take their time as well. It's a morning ritual for every Italian. Never wash the Moka Alessi in the dishwasher or with detergents, just rinse it under tap water.