I purchased the bottle from a shop NPC in Cyseal. The one that sells water and air spell books. Just save before you open his shop and keep save/loading until he sells them. I also bought the swirling mud from the quarter master up stairs in the house that has the cook.

They look like an ordinary bottle of water/beer.

Last edited by LightningLockey; 26/09/14 11:27 PM.
Every time there I run into trouble on the road, there is always a dwarf at the bottom of it. Don't they know how to drive above ground?