Almost all decaffeinated coffee contains at least a little caffeine. In fact, most cups of decaf have 15-20 percent of the amount of caffeine that a normal cup has. To put that in perspective, by drinking five cups of decaf, you'd be getting about the same amount of caffeine as there is in one cup of regular. Also, instant coffee has slightly less caffeine than regular coffee.
More facts about caffeine:
- Not all soft drinks have caffeine. Brands such as Fanta®, 7-Up®, Sprite®, and Mug Root Beer® are all caffeine-free sodas — but they still give you a kick because of their high sugar content. The two common brands of soft drinks with the most caffeine in them are Mountain Dew® and Mello Yello®. Some consumers might not realize that Sunkist Orange Soda® and Barq's Root Beer® also contain caffeine.
- In its pure form, caffeine is a white, crystalline powder.
- Ten grams of caffeine is considered a lethal dose. You would have to drink 200 cans of Mello Yello® or 50 cups of coffee to consume that much caffeine, though.