This is a mug shaped like an extra rotten partially peeled banana with the face of Tiki Bob (originally designed by Alec Yuill-Thornton).
From Tiki Classics:
"Rotten Bob is back, and this time he is EXTRA rotten!!
The orginal Banana Bob was sculpted by Mike Biggs of Biggs Tiki.
The third incarnation of Banana Bob, Extra Rotten Bob is glazed in a rotten blackened glaze with spots of a textured 'mold' glaze. Extra Rotten Bobs are produced/glazed by Will Fugate and limited to only 50 numbered mugs. Extra Rotten Bob measures just over 7 inches tall and because of his narrow shape holds 8 oz of liquid. We've come up with a delicious 'Banana Bob Crunch' cocktail and each mug will come with an illustrated recipe card.
No two Extra Rotten Bobs will look exactly alike. Some will have more exposed yellow than others, more brown, uneven eyes, patchy rough spots etc... etc. Extra Rotten Bob is meant to look like he's one step away from the compost pile and the glazing represents this in every way."