How to Choose a Coffee Machine For Pods The pod machines read the barcode located on the top of each pod (which is a disc of pre-dosed, sealed ground coffee, pressed between layers of filter paper). It is easy to insert it and push the button. Inject an espresso pod, https://coffeeeuk69570.blogrenanda.com/34225059/14-cartoons-on-best-pod-coffee-machine-that-will-brighten-your-day