This is a great, very old cocktail shaker made by Tiffany & Co. it is silver plate and very nice shape with a little patina that could be polished for a little more shine. The strainer cap means that you will never lose a lid as you turn it one way to shake and twist and lift to pour! No cap! It is marked on the bottom Tiffany & Co. Silver soldered and Patent Z. It has been engraved on the bottom also Private Car Atlanta which makes me believe that it once belonged to a railroad, probably the Atlanta named car.