Tea urns are a type of metal container used to brew and serve tea. They are similar to SAMOVARS, which are also metal containers used to boil water and brew tea. SAMOVARS have been used in Russia since the 18th century and are often ornately decorated. Tea urns are typically larger than SAMOVARS and are used to keep brewed tea hot for extended periods of time. They are often found in restaurants, hotels, and other public places.