He's only 16yo 
Ds2 is doing an apprenticeship, has cash to spend but almost full time at college. He and some friends have got into the habit of lunch at the cafe (caff). I don't think too hard about the quality of their diet!
He says today they were give free colas because they are "the politest customers we ever have"
As a parent of teens you have to take the wins where you can 