Consumer Reports, the highly regarded independent non-profit magazine, has a very simple quiz on their web site. It allows you to figure out how much you know about your favorite stimulant. Flipping through it you'll have questions like:
1. All of the following sodas are free of caffeine.
2. Ounce for ounce, Red Bull, the energy drink, has twice as much caffeine as Nestea
3. You can always tell if a food or beverage contains caffeine by looking at the ingredient
They have a total of 12 questions that you can finish in a minute. Take the quiz now!