Back in the 40s i had a steel fresh water rod. Don't know if they made them in copper at that time, but i remember savin up for it and bought it for $1.25.
I got a few of them.
I got a stretched copper rod by Penn Rod Co. still in the package NBF. Amazing how they made them . It would cost a few $$ today to do it like that. I also have a few telescopic rods.