Thanks for posting
I am thinking this is an IV (intravenous) drip bottle as you say.
See this eBay auction for a similar example
https://www.ebay.com/itm/VINTAGE-2000-ML-MILLILITER-IV-DRIP-BOTTLE-MAN-CAVE-BAR-DECOR/123221019656
We are used to seeing them in clear plastic bags now for so many decades that we forget about the days before plastic!