This is a mug with a Maori inspired Tiki head on each end. The top face has its tongue extended. The bottom face is smaller, upside down, and mirrors the top face but without the tongue extended.

From Tiki Farm:

"Originally launched in 2013, long before other mug makers entered the scene, the KuKu, Marq Marq and Moko Moko mug designs were a hit! Now we offer them in their 2nd Edition colors. These big and hefty mugs are some of the heaviest production mugs you will hold in hand!

Featuring Big Toe’s classic, chunky-splintered toothy design-style, these mugs are classic in their intentions, but with that special Big Toe twist of 'whacky'!

Moko Moko 2nd Edition stands 7.25 inches high and holds 19 oz."