What is it?

We are on our first trip away since lockdown and it took ages to pack this morning so out of practice I am, though M did his packing in three minutes flat.
Anyway, here we are on the Ayrshire coast having spent the afternoon exploring Culzean castle. (I can’t put any links up because despite our hotel in Ayr boasting free wifi in all rooms we have none. The booster routers are erratic ).
As for the photo- any guesses? It’s a Georgian bathtub. It would be wheeled around to bedrooms when required though the guide informed us they did not wash very often in those days not surprising since these castles were cold bleak places.