The meaning of good design

[Terry]

... They need to be clearly ... numbered with cups ...

To paraphrase a well known phrase or saying ...

A kettle isn't just for coffee!

I read the article out to Helen as we compared notes and then your post.

Fine until we got to 'cups' then 'No!'

Ours is marked in ml (and starts at the minimum level - 750ml - so it is obvious) so it is easy to fill it with exactly the amount needed (and you can always divide by 250ml or whatever size cup you are using if you like).

It is branded PROline, has a pop-up lid and two sight glasses - Helen is left handed, so that's important.