The milk protector milk bottle

ABSOLUTELY PURE MILK (at the top)
THE MILK PROTECTOR (at the bottom)
The picture in the glass is of a person sitting on a stool milking a cow, the milk is going into a bucket and there is another cows head in the background.
The top of the glass bottle has a pouring spout as well.
My father found it at and old woolshed about 7yrs ago while it was being dismantled.