Cook-Cook's mangled head

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
Take the head of Cook-Cook the fiend and present it to Major Dhatri for a reward.

If you take care not to destroy Cook-Cook's head when killing him (this applies for Violet and Driver Nephi as well), you will obtain an undamaged head that is worth more caps to Major Dhatri.