Yeti Pee is a yeti waste that takes the form of a strong smelling golden sludge which is an effective burn medication that is used to take the sting off the worst burns. After being applied, it needs a minute to sit before taking effect. It is recommended by Elwin for the patient who used it to wash their hands about twenty times to get rid on the smell, as it can stain on you for days, if not washed off. Sophie took an extensive shower to get rid of this putrid smelling ointmenent's effects. It is later mentioned by Elwin that this liquid is hard to come by, though he uses the comparison later that it would be easier to fill a lake with it, than get his hands on ogre substances. Sophie uses it in Book 1: Keeper of the Lost Cities, and also narrowly avoids using it in another situation later on.