How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode that is on the top of the pod (which is actually an un-sealed disc of pre-dosed ground coffee compressed between two layers of filter paper). It is easy to insert it and push the button. https://coffeee-uk34244.collectblogs.com/73976126/the-most-important-reasons-that-people-succeed-in-the-pods-coffee-machine-industry