Tumbuna was designed and manufactured by Cass McClure aka OceaOtica. The mug is based on the traditional New Guinea design from the Sepik River region. The mug is essentially a bust featuring a tiki with an long oval face, large eyes with cowry-shaped pupils, a long thin nose that flares at the nostrils and a triangular shape adorning his forehead. This version has the Underbelly of the Grey Plover glaze.