Milk, noun: Additive to coffee. For café au lait, cappuccino, latte macchiato, etc. milk foam is better; preferably with very fresh milk with a higher fat content. There are numerous methods of preparing it. From steam lances to espresso machines to tiny battery-operated agitators to small immersion heater-like machines to plunger pots (French press), through which hot milk can be “pressed”. It’s almost a science in itself. However, you should always drink “your” coffee pure at first since milk drastically changes the taste of the coffee.