Homeopathic Caesar Urine
Dividing the 40 cubic meters with the total volume of all oceans we obtain that one molecule in every 3.6 * 10^15 today is genuine "chez Caesar". The strongest homeopathic medicines have been diluted up to 10^30, but 10^15 should already have a clear effect. Unfortunately I can't quite figure out what it should cure - megalomania, or perhaps laurel rash?
Another way of looking at this is to say that the Coca-Cola company has sold half a millilitre of Caesar's urine world-wide during its entire operation. I guess that's the "secret ingredient".