How to Choose a Coffee Machine For Pods The pod machines read the barcode on the top of each pod (which is an undosed disc of sealed ground coffee, pressed between layers of filter paper). You simply insert it and press a button. Inject an espresso pod and this machine https://www-coffeee-uk00639.blogoxo.com/28461372/pods-coffee-machine-11-thing-you-re-forgetting-to-do