How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode at the top of the pod (which is actually a disc of sealed, pre-dosed ground beans that are encased between two layers of filter paper). It is easy to insert it and push a button. https://coffeee41931.blogdanica.com/28244009/the-most-hilarious-complaints-we-ve-seen-about-best-pod-coffee-machine