NO TOUCH Capacitive Touch Ring 17mm

thingiverse

You can fill this void space in the ring and shaft with aluminum foil or other conductive materials to enable the ring to function as a capacitive touch device while worn. Keep it on and use it for pressing buttons at the ATM, elevator, or signing your name at the cash register. This is practical when you need to frequently press buttons but can't wash your hands often, making it easy to disinfect the tip after each use.