Bentinck's Very Old Peculiar Brandy

Bentinck's Very Old Peculiar is the favorite tipple of Archchancellor Mustrum Ridcully, who has managed to procure a hat which holds, in the crown, a bottle of the restorative, and whose top unscrews to provide a small cup for emergency application. The quality of this spirit may be inferred from the price of nine dollars a bottle (several hundred Roundworld U.S. dollars.)