From Trader Vic's:

"Designed by Trader Vic's legend, Javier Del Campo, the Sepik River mini is part of our Papua New Guinea mug collection. This mini holds 2 OZ. The inspiration for this design comes from the Sepik river area of Papua New Guinea. The Sepik river is the largest river in Papau New Guinea."

There is also a full-sized mug version of this design.