1/3 coffee + 1/3 milk + 1/3 milk froth in a 150 ml coffee mug
that amounts to 50 ml of each of coffee, milk and froth
Surprisingly only one coffee shot goes in to a cappuccino which is just 30 ml
Though milk forma only 50 ml because a cappuccino uses steamed milk which increases the volume by aerating it and hence fills up the 150 ml mug
Its a good to know fact :)