A filter coffee machine with a separate or built-in bean grinder finely grinds coffee beans for you. The coffee grinder grinds the beans on the spot, so you can make delicious and fresh coffee with them. You don't use pre-ground coffee for this. When you adjust the grind size to be finer or coarser, you affect the taste and strength of the coffee. The brands Philips, Melitta, Krups, and Inventum have filter coffee machines with beans.