Average cup of coffee has about 95 my per 8 oz cup. The article reported 2-4 mg per liter. A liter is about 32 oz.
The writer miscalculated. Is the product pure caffeine, or a caffeinated powder. Either way the writer should be demoted and the editor should be fired.
Pardon me: 95 mg per 8 oz. Cup of coffee. Bs spell checker.