This is one in a series of mugs made by Tiki Rob that have tiki masked figures (Menehune).

The Crazy Al Version was limited to 10 pieces and based on Crazy Al's #13 Tiki Carving.

There was also a "Shrunken Head" version sold through eBay with real shell teeth on the mask and the head behind the mask peering out at the side to reveal it as a shrunken head.