Trying to figure out what this bottle was for and possible date

[Trukmek]

 

[Trukmek]

I know that this bottle is solarized glass, and was manufactured by J.T. & A. Hamilton Company some time between 1900 and 1943. I'm trying to figure out what it possibly was used for. It has a metal cap that is fixed to the bottle, but has a screw-on cap that looks like it has a pin hole with a piece of metal in it? Sorry, I'm new at this so don't know how to post pictures with words. Thank you for your help.

 

[bubbas dad]

just a guess but with that top, it reminds me of a hair tonic or something along that line

 

[hemihampton]

The top reminds me of a Barber's Hair Bottle? Leon.

 

[Semar]

My first thought was yes, barber's bottle, maybe for Bay Rum; nothing fancy but utilitarian. I think I remember the bottle from my small-town barber, Joe when I was a little kid. Have you tried to remove the cap?

 

[PlaneDiggerCam]

Hair Tonic, Perfume, Cologne, Bay Rum, Toilet Water, or something like that.