This is a mug shaped like the shell of a sea turtle.
The center design pays homage to the film, Moana (2016), and the Heart of Te Fiti. The heart of Te Fiti is an ancient gem possessed by Te Fiti, the mother island. The heart gave her the ability to create islands filled with flora and fauna to provide homes to the people of the South Pacific.
Around 400 of this design were produced in a series of batches of 50. This design was issued in an Oakwash Wave Glaze followed by the Teka Lava Glaze.