How to Choose a Coffee Machine For Pods Pod machines work by reading the barcode that is on the top of the pod (which is actually an un-sealed disc of pre-dosed ground beans that are encased between two layers of filter paper). You just insert it and press a button. https://coffeee57011.blogripley.com/28893229/12-companies-are-leading-the-way-in-best-pod-coffee-machine