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). You just insert it and push a button. Inject an espresso https://coffeee28334.timeblog.net/64194428/20-important-questions-to-to-ask-about-best-pod-coffee-machine-before-buying-it