There is a magnet integrated into the base of the plastic cup. To ensure that the cup stays in place while driving, it must be combined with a metal counterpart. The set includes a metal nano gel pad for this purpose. The force ratio between the magnetic cup and the metal nano gel pad is perfectly balanced, so that the cup is held in place by the pad on the one hand, but can also be easily removed from the pad 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 cup wherever you need it or store it rattle-free and securely in the cupboard. The vacuum lid makes the cup perfect for on the go. We aim for the highest quality and are Made in Germany. All plastic collections are tested , tasteless and BPA-free.