It's glazed ceramic, tan and brown. There's no handle. It's about 21" tall and about 10" diameter. It's quite heavy. The sides are straight up and down.
That would be an English rum jar. Often labeled with SRD (Supply Reserve Depot), these jars historically held rum for British soldiers fighting in wars. You can learn more about them here.
I'd call it a jug although they often have a handle you can put one finger through. Generally they're stoppered with a cork.
Possibly a carboy : a large container, sometimes in a frame for support, used for storing and transporting liquids:
A large carboy will protect wine from a fairly large temperature swing.
(Definition of carboy from the Cambridge Business English Dictionary © Cambridge University Press)
Also a demijohn.
No sense not getting in deeper: [National Directory of Commodity Specifications: Classified and Alphabetical Lists and Brief Descriptions of Specifications of National Recognition, 1945 (US regulations)
...Storage of Acids US Gov Interstate Commerce Commission Regulations for Transportation of Explosives and Other Dangerous Articles Shipping Container Specification 1A Boxed Carboys Glass Earthenware Clay or Stoneware Specification IB Boxed Lead Carboys Specification 1C Carboys II in Kegs Glass Earthenware Clay or Stoneware Includes requirements for manufacture of carboys outside containers and tests Published by American Trucking Assns Inc Tariff Bureau and Assn of American Railroads Bureau of Explosives US Gov Interstate Commerce Commission Regulations for Transportation of Explosives and Other Dangerous Articles Shipping Container Specification IX Boxed Carboys 5 to 6 Gallons for Export Only Glass Earthenware Clay or Stoneware Single Trip Container Includes requirements for manufacture marking and tests Published by American Trucking Assns Inc Tariff Bureau and by Assn American Railroads Bureau of Explosives
It could be a canopic jar.
Canopic jars were used by the ancient Egyptians during the mummification process to store and preserve the viscera of their owner for the afterlife. They were commonly either carved from limestone or were made of pottery.
From Oxford English:
A covered urn used in ancient Egyptian burials to hold the entrails from an embalmed body.