[drypowder]

My Cliff Calvin sense tells me it is an entomologists observation containment box. The walls are transparent and the lens in the lid is a magnifier and the protrusion on the one side is too small to be a handle so it is likely to be a vent or a breather. Life cycle behavior etc.

[right way right]

Close, I think this is a Piss Ant fighting ring.

[Netizen]

The sides are tin and the glass doesn’t magnify.