Gem Dandy Electric Churn glass churning jar

This item or jar has been in my family for as long as I can remember. I don't want to sell it, I just would like to know how much it is worth so I can insure it, if necessary. All I know about it is that it has embossed on it the following: To be used with GEM DANDY ELECTRIC CHURN Made By Alabama Manufacturing Company, Birmingham, ALA.
I don't know where it came from, I just know that I have been dragging it around with me since 2001, after my mom passed. No one in my family wanted it so I took it. We've had it for at least 54 years, I've been around as long as it has.