Energy Fiend has a great caffeine content database that can give you the exact amount of caffeine in just about any drink you could want to know about. It is a great resource because, although drinks containing caffeine make it clear in the ingredients list, they don't list the actual amount of caffeine that they contain. Coca-Cola, perhaps taking a cue from E.F. is hoping to make getting this information easier for consumers by adding labels to all of their products indicating their exact caffeine content.
Such labels are already found on Enviga (8.33 mg/oz.) and Full Throttle (8.81 mg/oz.) and Coca-Cola Classic (2.83mg/oz.) cans will have it by May, with the rest of the beverage lineup - including Diet Coke (3.75mg/oz.) to follow over the rest of the year, though the labels will not be put onto the bottles and cans of Coca-Cola products sold outside of the US.
For comparison, drip coffee (black) has 18.13mg caffeine/oz., Red Bull has 9.64mg/oz. and regular black tea has 5.88mg/oz.
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