This is an Easter island Moai with topknot designed by Tank Standing Buffalo for Tiki Farm.

From Tiki Farm:

"We proudly bring you a classic Tiki mug design, but with a unique 'Tank-twist'. Rongo-Rongo is an inspiration of the majestic Moai Tiki Gods of Easter Island.

Created for us by our brand-new Art Director himself, Tank Standing Buffalo! Tank created his version of the Tangata Manu (bird man) on the backside and kept with stylings of some of the behemoth statues, maintaining the topknot (Pukao) feature as well, found on some of the Moai on Easter Island!

Glazed in a dusty lava-inspired gray with a black wash, Rongo Rongo stands 7 1/2 inches in height and holds 12 oz."