The milk jug is perfect for heating and frothing milk foam for a single or double cappuccino or latte macchiato. To get the right milk foam for your real Italian-style cappuccino, it is important to choose the right size milk jug. If you have a milk jug that is too small or too large, you may not get perfect milk froth. That's why we offer all sizes of milk jugs so you can choose the perfect one for your purpose. The amount also depends on the size of your cup.