Used back in the late 30's well into the 40's. The old milk bottles deposited at your door or bought in the store didn't have the cream skimmed off the top(skimmed milk), so after sitting for a while all the cream would rise to the top. Looking at the bottle, the top 2-3 inches would be all cream which most people liked to skim off and use elsewhere. At the time, there was a neat little tool we used to remove the cream. It was a glass straw sort of in the shape of a shepherd's hook and one side of it had a rubber collar just slightly larger in diameter than the neck of the milk bottle. As you pressed it down into the bottle, it forced the cream out through the straw into a different container you provided. After you pressed it in far enough, all the cream had been forced out of the bottle and nothing but milk was left. It was one of those jobs a young lad like myself enjoyed doing, I had no idea how it worked but was fascinated by it and of course....I was helping mom.
If anybody can find a picture of one I'd sure appreciate it, I need to show one of my daughters that dad really isn't pulling her leg this time.
