I wonder how much pocket money they are getting from their parents to be affording this and studying at Starbucks (or any high priced coffee tea joint). I definitely couldnt have done this back when I was studying, and I dont think I can afford giving my children so much money in a few years' time. Gosh!
During my school times, when some friends decided to go places like Starbuck or Coffee bean, I only drink the free plain water.
Now even when eat out alone, I normally don't order any drinks if possible. As feel isn't worth to pay $1++ for a can drinks (eg in coffee shop). Only order drinks if going to sit and having some chit-chat with friends etc.