Why I could never use those cups for drinking. I cannot stand drinking out of paper cups, and I am weird about the amount of straw tip that sticks out. That is WAY too much! (Yes, I am the girl who uses the shorter straw in Venti cups at Starbucks and has been known to change from an iced drink to a hot one if they only have the super long straws.)
I will happily pack a plastic cup (doesn't have to be name-brand) and use the paper cups to refill it.