From Tiki Farm:

"This Ritual Skull Mug design comes from a mystical place lost in Mesoamerican history. A place where shamans, necromancers and spiritual leaders made contact with their ancestors by drinking from a Ritual Skull mug filled with mystical potions and secret concoctions.

Unlike its distant cousin the Sugar Skull, the Ritual Skull Mug was designed and made to facilitate communication with the deceased rather than to help remember a person who has passed. Is it a smartphone? No. A radio? No. The method of communication depends entirely on what you pour into the skull to quench your thirsty soul and make contact with those in the afterlife!

The Ritual Skull Mug features a matte Scrimshaw yellow glaze with a rust colored wash and the interior is a metallic bronze. Ritual Skull Mug stands 5.25 inches high and holds 21 oz."