The Tibetan Snuff Bottle is the third treasure that can be found in Uncharted 2: Among Thieves.
The Tibetan Snuff Bottle is found in Chapter 1 - A Rock and a Hard Place. As soon as you emerge from the previously-locked door, don't move. In fact, keep that gun armed that you used to break through the lock in the first place. Nestled in the corner of the wreckage, you'll find this extremely well-hidden treasure. However, to find it, you'll need to look up. The corpse of a thug hangs precariously above, and the telltale flashing of a treasure can be found on his person. Shoot it down with your firearm, and then claim the snuff bottle in the powdery snow.