Purecaf is a 2 fluid ounce bottle of liquid caffeine. There are several products like this available and one even made our 7 Most Dangerous Caffeine Products List.
This data showing caffeine in Citrus, Cream, and Pepper flavored beverages. It covers mainstream brands and many store/ generic brands of these sodas.
We look at the results of a very large cola soda caffeine test conducted by Chou and Bell of Dept. of Nutrition and Food Science, Auburn University.