Vintage Stirrup Cup Silver Plated Nightcap Or Sleeping Cap

A lovely vintage silver plated Nightcap, stirrup cup.  I believe this is silver plated, I cannot find any marks, and it does tarnish and polish like silver.  A very decorative and interesting item.  It is in very good condition, I polished it a little but left some tarnishing for detail, also very clean inside.

This cup is approx. 3 inches tall, and 1 1/2 x 2 inches at the opening.