Void fill foam packing peanuts are a loose-fill packing material that is used to prevent damage to fragile objects during a move or shipping process. They are shaped to interlock when compressed and free flow when not. They are roughly the size and shape of a peanut and usually made of polystyrene.

From electronics and tools to toys and everyday household supplies, packing peanuts fill every corner and keep your packed items from shifting during your move. They may be used and reused beyond moving or shipping purposes, sometimes even to fill a bean bag chair or used in a variety of crafts.