When packing items with foam peanuts it’s important to ensure that they are compressed and will hold the items they surround firmly in place. One of the best ways to do this is to slightly overfill the box when adding the packing material, compressing it while taping the box shut. It’s easy to tell if this method is done right, as the sealed box will feel solid without internal movement when shaken but there also won’t be any bulging of the packaging.