A Tokkuri is a carafe for serving and heating sake. Traditionally made from ceramic or earthenware. The neck of the carafe is narrow to help retain heat. This carafe is partially submerged into a hot water bath to warm the sake. A single serving sake tokkuri is has a size of one “go” or ichigo – 180ml/6oz.
For more information on warming sake:
Sake 101 – Sake Temperature