I always mean to ask you, when you say “hot milk” do you mean you make a latte or cappuccino? I mean, how would you heat just a little milk to pour into a black coffee for instance?
No, I don't make a latte or cappuccino; having to master the art and technique of all this frothing stuff is far too complicated - my bewildered brain doesn't work first thing in the morning, - part of the point of the coffee is to help kick-start that somnolent mental apparatus - and, besides, I want to hit that sweet spot where I can (reliably and automatically) prepare a mug (or two) of excellent coffee without over stressing my stretched and strained mental faculties, or having to try out anything new.
Instead, I simply heat some (organic, full fat) milk in an Italian stainless steel saucepan until not quite boiling; the amount of milk I use depends on a number of factors: My mood, whether I want a "milky" coffee drink, (in which case the milk would comprise about half the liquid) or simply something with a little milk; how warm or cold I am - this started last year when I realised that putting cold milk into coffee served to cool it down, which, while not an issue in summer, is not at all pleasant in winter, I want my coffee hot, not lukewarm; how much milk remains in the fridge - a local shop keeps some organic milk for me each week, but - there is always one day a week when I am in danger of running out.
While doing that, the coffee (usually prepared in a Hario dripper with filter paper, but sometimes in my Le Creuset French Press, or, as today, my Villeroy & Boch ceramic moka pot), is also prepared. As is freshly squeezed orange juice, and toast, (with butter, and bitter marmalade); sometimes, I will also prepare boiled eggs (free range, organic).
As for measurements of the milk, I do that by sight, in the saucepan, and hardly ever (I won't quite say "never" that is tempting fate, but, almost never) get it wrong.