How to Choose a Coffee Machine For Pods The pod machines read the barcode that is on the top of the pod (which is actually an un-sealed disc of pre-dosed ground beans that are encased between two layers of filter paper). You simply insert it and then press the button. https://www-coffeee-uk23067.like-blogs.com/28210704/10-startups-that-ll-change-the-pods-coffee-machine-industry-for-the-better