Gore Bag (Fallout 3)

Gore Bags are a type of item container commonly found in areas inhabited by Super Mutants in Fallout 3. They are generally filled with 2 mutilated body parts, (such as Mutilated Torso, Mutilated Skull, Mutilated Arm or Mutilated Leg) in addition to other miscellaneous items such as Ammo, Bottle Caps, and occasionally a few Frag Grenades. Presumably, all the items found in the Gore Bag were those carried by the victims. They can be found in most Super Mutant camps and strongholds, as well as Vault 87.

Its likely that the Capital wasteland Centaurs are made up of these human parts given that in most Super Mutant camps there will be these unique containers