COCONUT
A coconut is not a particularly effective weapon to use against the undead, but with the correct application it will do the trick of destroying a brain. There is, however, an even better use for this humble nut and that is in your training.
A coconut is hard and cylindrical and thus very similar to a skull (in most cases it is actually thicker and harder). It’s therefore an excellent gauge of how effective your bludgeoning weapons are and will allow you to measure just how much force is required to smash the coconut – and ergo a human skull – when the time comes. Having this handy item will also save you from having to practise on your friends or grandparents.