How to Choose a Coffee Machine For Pods The pod machines read the barcode on 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). Simply insert it and push a button. Inject an espresso pod, https://coffeee15094.blogrelation.com/34342549/17-signs-to-know-if-you-work-with-pods-coffee-machine