A bottle, often square in form, made so as to fit into a case with others.(noun)
The Century Dictionary (Public Domain)
Use "case-bottle" in a sentence
"When supper was over, a small case-bottle of brandy, in a curious frame of silver filigree, circulated to the guests."
"When the repast was concluded a jug of hot water was placed before Sir Pitt, with a case-bottle containing, I believe, rum."
"There was claret and a cold fowl put ready for him on the sideboard, and a case-bottle of old brandy too, with a couple of little glasses on the silver tray with the Barry arms emblazoned."