The average person would die after drinking approximately 100 cups in one sitting. A single 12 oz. Both drinks are made primarily with espresso, steamed milk, and foamed milk. This results in the Cappucino having a stronger coffee flavor than its more milk-laden counterpart. Both do however contain the same amount of espresso and therefore the same amount of caffeine.
White chocolate has no cocoa solids which is where the caffeine is.
The theory is that it will rid the liver and large intestine of toxic substances. You may not want to try this at night since much of the the caffeine is absorbed through the colon.