Sorry, I didn’t post a description. Yes, it’s like a thermos but not vacuum. It’s ceramic lined with a beautiful glass stopper. That’s about all I know about it! Hopefully someone knows more. p.s. does anyone else have an affinity for old vacuum bottles?
I'm guessing it's a US 1 Gallon [3.8L] jug by the size. Maybe less if the inside insulation is more. Also guessing pre- WWII. But I'm no authority on vintage thermoses. [EDIT] Looking closer it's patented 1925. Nice jug. Heirloom or thrift store find?