yoki

When it's draught, you'll probably see a volume indication, such as 400ml, 500ml, 50cl etc., and that's what you ask. Half or Third works fine.

As a student, I liked summer courses. However, as a TA who needs to prepare and grade homework and tests, this will make me spend much more time. It will also take up more of the lecturers' (faculty) time, which is usually hard to spare as it is. But I guess it's just one aspect of it. I can also think about a disadvantage in such dense classes - it's much harder to make up if you miss a class, or if you need postponements in hw...