Legend has it that Napoleon held Emmanuel Courvoisier's cognac in such high esteem that he took with him hundreds of bottles to enjoy during his years in exile. This reserve became known as""Le Cognac de Napoleon"", a description still proudly borne today on all Courvoisier cognac. UK Government's Sensible Drinking Limits. Men - 3 to 4 units, Women - 2 to 3 units per day. Don't drink&drive. For more information see www.drinkaware.co.uk. 28 UK Units. 1 UK Unit Per 25ml serving. 40% vol.