The skull clunks gently against the bottom of the jar after being shaken, not stirred, so vigorously. It may be an indestructible jar, and a deathless haunted skull, but it can still be rattled.

"WOULD YOU CARE TO BE MORE SPECIFIC, OR WOULD TOFFEE BANANA SUFFICE?"

How is it the Skull can remember the taste of a toffee banana but not its own name? Ah, the mysteries of life-after-death.