How to Choose a Coffee Machine For Pods The pod machines read the barcode that is located on the top of each pod (which is an undosed disc of sealed ground coffee that is pressed between layers of filter paper). It is easy to insert it and press a button. https://coffeee83644.dailyhitblog.com/33755123/10-erroneous-answers-to-common-pods-coffee-machine-questions-do-you-know-the-right-answers