Featured What is this? Fire grenade??

trying to figure out what this, only thing we have come up with is a fire grenade? we can't find a way to open it. 9" total length. thanks for looking!

 

it's a good guess.................

 

I really don't know but it reminds me of an old oil lamp. I guess the top would have to pop up though to insert the wick. Hmmmm.

 

I'll chime in as a fire (extinguisher) grenade also - earlier ones were filled with salt water but then some genius thought filling them with carbon tetrachloride was a healthy alternative - but it evaporates in the tiniest presence of oxygen/air. They used to hang them by trash cans and other fire hazard places hence the loop.
It was a popular shape..........