This mug was wheel-thrown of porcelain.  It is decorated with tiny oyster mushrooms near the base.  The mushrooms are washed with a sepia brown stain, and the mug itself is glazed with my favorite matte aqua.  The inside is glazed with a shiny iron brown.  
 
Handwashing is best
 
4 1/8"  X  5" including handle
Holds 16 oz.