I'd like to learn about it. Thank you.
Turns out it wasn’t him, it was someone else, maybe with a name beginning with “M”, who had a vacation house in, IIRC, Virginia.
Wish my memory worked better!
I think he said that he washed them with very hot water and detergent, let dry, and then filled them, and used them in the vacation house with no problem.
But I vote for non-milk containers, I’ve never been able to get them clean enough.