How to Choose a Coffee Machine For Pods The pod machines read the barcode that is on the top of the pod (which is actually a sealed disc pre-dosed ground beans that are encased between two layers of filter paper). It is easy to insert it and push a button. https://coffeee-uk31892.thekatyblog.com/27703984/the-no-1-question-everyone-working-in-best-pod-coffee-machine-should-be-able-to-answer