This Mug was wheel-thrown off a hump of SMY clay.
Someone put a shell in the bottom of this Mug.
The mug was glazed with Clear, Linen white, and fired on its side with glass frit atop.
I fired it in my electric kiln to Cone 5.
Note the Immortalized Shell Prints formed in glass on one side.
This mug stands around 3 inches tall.