Blue bottle - age ?

[Fishwick]

Being new to bottle digging, can the forum give me a rough age to this blue milk of magnesia bottle- screw top?
I found it yesterday in a very mixed up dump on one of my permissions (dairy farm.)
The dump had been discovered next to the cow yard when they were digging a lagoon for the slurry. They have disposed of the spoil in one or two places around the farm.
I had found a clear jam jar and a huge patch of nettles next to a pond. I’d not long read the advice of others in connection with making a soil probe and I was looking for big brambles .

[alfaowner]

That’s a nice bottle ,

Looks like this one

www.worthpoint.com/worthopedia/nicely-c ... 1883984025

[beaubrummell]

The screw top dates it at 1930/40.

[Fishwick]

Thanks for your help

[grumpyjohn]

Yes I was given Milk Of Magnesia as a child in the 1950's for indigestion and a bad tummy!!!!

[dondo]

It's a fully machine made bottle, i think they were still being made of glass up to the 1970s.