One of my classmates gave me a post-exam gift last week: a little bottle of “5 hour energy”. Apparently this little vial can give me a shot of energy, lasting for about 5 hours. Would that really work? Unfortunately, it also says that it has about the same amount of caffeine as one cup of coffee. One cup? That’s all? Last week there were days when I was drinking more than five cups of coffee a day. One cup, ha!
