Miruvor

On Caradhras, when the snow was going over their heads and Boromir said this would be the death of the halflings, Gandalf went through his pack and brought up a flask of leather, with barely a swallow in it for each of them and none to waste — miruvor, the cordial of Imladris, a parting gift from Elrond. One mouthful of the warm, sweet-smelling drink was enough: Frodo's heart steadied at once, and the leaden sleepiness went out of his arms and legs; the rest of the Company came round in the same way, their hope and their energy restored. Gandalf spared them one more mouthful each after the Redhorn Gate had defeated them, and a third sip on the stair in Moria after the horror at the gate, saying it would not last much longer and that without great luck they would need all that was left before they saw the other side.