This is a ceramic liquor jug, with a rather unlikely spout. Yes, the booze comes out of where you think it comes out of.
Both the jug and the woman's rear-end bear the legend "Lay off. This is the old man's private stuff."
I leave you with the seller's own haunting words...
"One 'pour' breay is clooged with what appears to be some factory ceramic glaze."
(Found by Go Mifune)