What sort of powder would need to be stored first then mixed?
Why not just mix it first then store the mix?
Only thing I can think of would be for something that would cause a chemical reaction...... but for what purpose
![icon_scratch :icon_scratch: :icon_scratch:](https://www.treasurenet.com/smilies/icon_scratch.gif)
Most chemicals and even arsenic would probably react with the copper and it doesn't look corroded.
I doubt it's a trap. What would shut the door to trap the vermin?
If its for containing poison, then there's no need to trap anything.
And what kind of poison needs to be mixed just before using?
I'm thinking it has three different compartments for storing/dispensing three different items that are different but related somehow.
The size would be right for carrying by a dog, or to fit in a large pocket or pouch.