A pot magnet, also known as a cup magnet, is a type of magnet that is encased in a steel cup or pot-shaped housing. The magnet is usually made of a strong neodymium material, which provides a high magnetic strength.The steel cup or pot serves several purposes. Firstly, it protects the magnet from damage and corrosion, extending its lifespan. Secondly, it concentrates the magnetic field to the open face of the magnet, making it more effective in attracting ferromagnetic materials.