How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode at 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). It is easy to insert it and press the button. https://www-coffeee-uk23398.fireblogz.com/59646568/the-9-things-your-parents-taught-you-about-best-pod-coffee-machine