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). It is easy to insert it and press the button. Inject an espresso pod, and https://coffeee-uk96638.dgbloggers.com/28717935/it-s-the-next-big-thing-in-pods-coffee-machine