Heavy cast iron container with Qian Long Emperor characters, Tea Accessory

Heavy cast iron container with Qian Long Emperor characters. The characters on the lid are the same as “乾隆通宝”，Qian Long Emperor sanctioned coins. The Qing dynasty (1644–1912) was the last imperial dynasty in China. It was led by the Manchus, a semi-nomadic people from northeast Asia. 2.5” tall 5” across Could be used for  tea ceremony or for incense. If you know what the intended use for this piece,  please email me.