There is a magnet integrated into the base of the plastic cups. To ensure that the cups stay in place during the journey, they must be combined with a metal counterpart . The set includes two metal nano gel pads for this purpose. The force ratio between the magnetic cups and the metal nano gel pads is perfectly balanced, so that the cups are held in place by the pads on the one hand, but can also be easily removed from the pads for drinking on the other. Thanks to smart nano gel technology, the pads can be removed at any time without leaving any residue , cleaned with clean water and reused as often as you like . This gives you maximum flexibility and you can always use your magnetic cups wherever you need them or store them rattling-free and securely in the cupboard. We aim for the highest quality and are Made in Germany. All plastic collections are tested , tasteless and BPA-free .