Mug - Gzhel product. Gzhel - name of Russian ceramic, made near Moscow. Firstly produced in 14 century, this ceramic products become very popular in Russian and Europe. Gzhel products made from Unique Russian clay. Paint made from cobalt paint, with heat treatment. This mean, that paint saving for a very long time (2-3 century at least :) ). Mug made from Gzhel clay - is a great additional part for your Gzhel set. It's keep tea hot for a long time and very durable. Original Gzhel products! Size - 10x6x8 cm