i really hate that, i used to save all my potions and i thought that i would use them, but i ended up dieing with 10+ potions that could help me, so i just started drinking the potions like crazy but then a few turns later i would need them desperately.
Here are my bone files, most of the bones are just from exploring IVAN and seeing what would happen. I don't want to say anything that would give away the surprise... ^_^