From TikiLand Trading Company:

"This hatbox is haunted by a less than happy haunt. Between evil grins and maniacal laughs, sometimes this ghost's head will vanish from atop his body and materialize inside the hatbox he's carrying.

This mug holds about 16oz (varies slightly mug to mug), and is about 8.25 inches tall."

This is an unspecified limited edition, designed and sculpted by THOR and based on the Disney Haunted Mansion Hatbox Ghost character.