I thought it was intentional!  

"Coca-Cola was named back in 1885 for its two "medicinal" ingredients: extract of coca leaves and kola nuts. Just how much cocaine was originally in the formulation is hard to determine, but the drink undeniably contained some cocaine in its early days.   How much cocaine was in that "mere trace" is impossible to say, but we do know that by 1902 it was as little as 1/400 of a grain of cocaine per ounce of syrup. Coca-Cola didn't become completely cocaine-free until 1929,"