Lucy Pevensie, a pivotal character in C. S. Lewiss Chronicles of Narnia, was, as Queen Lucy in The Lion, the Witch and the Wardrobe', gifted a bottle of magical cordial by Father Christmas along with her dagger, prior to the Battle of Beruna. The cordial was said to be made from the juice of Fire-Flowers that grew in the mountains of the sun, with a single drop curing almost any illness or injury, bringing people back from the brink of death in some cases.  The use of the word "cordial" by the author was archaic even at the time.
Miruvor (cordial of Imladris) J.R.R. Tolkien, Fellowship of the Ring.