Shark Tank Pitch
Have you ever had someone messing with something that you don't want them messing with, but they do anyways without you knowing? The solution to this is actually really simple. By replacing parts on, for example, a phone, with iron, it could become evident that someone has tampered with it. This is because the lipids, or oils on our skin will react with the iron ions, and that is what causes iron to give off that familiar metallic smell. Humans naturally know the smell very well because iron is in our blood and when maybe you start bleeding, it will start to react with the oils, giving off that smell. By replacing even small parts on objects that are likely to be tampered with, that smell would give away if someone had been messing with your stuff recently.