They don't use paper cups, but rather paper sleeves to drink out of. It may take some getting used to, but after about ten gulps (they don't hold a lot of water) your sleeve will pretty much be rendered useless. This is the norm especially at our work, where our students race at the sound of the bell at break times. They sprint like mad to these water coolers, only to get paper cuts on their lips while drinking filtered water. They come back to class with blood lips (okay, maybe there is a slight exaggeration here) Paper cuts suck--especially on your lips!
Check out how small these paper sleeves are--I can barely hold one in my hand:
Bonus picture of the day:
This was taken a while back and I have been waiting to post this...it's a delivery lady returning back to her origin of work--but she is balancing three trays of dirty dishes on her head while running in the rain--impressive indeed!