This Sake bottle, otherwise known as a Tokkuri, is used to serve both cold and warm Sake traditionally.  To warm your Sake simply submerge your Tokkuri into a pot of boiled water until the desired heat is achieved.  The Tokkuri is designed with a narrow neck to prevent heat from escaping. As this Tokkuri is an Earthware product, it also keep your cold Sake chilled.  

Dimensions (bottle):

(H) 19.5cm

(W) 6.5cm