This is a mug shaped like a skull used in anatomy classes with a brain inside of the cavity. The limited edition comes with different colored brains. This version went heavy metal with a spiked skull visor. Measures overall at: 6"H X 4.5"W X 5.5"D. The brain fits down into the skull like a lid and the right side of the brain pulls off as a lid also. So it's essentially a double lidded mug that holds two separate drinks. Colorations throughout the edition will vary and be unique.