This is an antique baluster shaped gill-sized pewter tankard. The item has been tested and is not watertight. The tankard has a split running along the middle of its body just above its middle band and this is where it leaks.
Antique Victorian Baluster-Shaped Pewter Measure – One Gill
Antique Victorian Baluster-Shaped Pewter Measure – Half Gill
Antique Jacobean Shaped Pewter Half-Pint-Sized Tankard - Unknown Maker
Dixon & Smith early 19th Century Georgian boat shaped pewter tea pot
Early 20th Century Antique S Shaped Butchers Shop Meat Hook