I'm looking for any information about Royal Mfg. company that made the Royal Thermic Jug
I have one too, with a ceramic liner. I found a few scattered references to the R.M.Co. in Toledo by googling the company's name, but not much of substance--mostly just a few references to the company in various Ohio commercial archive documents. Went back at least as far as 1886.
If you ever hear anything, could you let me know? Thanks! --firstname.lastname@example.org