I am a serious coffee drinker... I am non functional in the morning until I have a POT of coffee... But thanks to my picky stomack, I probably use for the whole pot what most use per cup. In the winter months, I drink a cup or two in the afternoon too. Coffee does not keep me awake but if I drink a glass of tea, I better not need to sleep for at least 8 hours.. Thanks to my picky stomack, I can't drink soda's, juices or milk. Coffee, tea and water is all I can drink...