How to Choose a Coffee Machine For Pods The pod machines read the barcode that is located on the top of each pod (which is a disc of pre-dosed, sealed ground coffee compressed between layers of filter paper). You just insert it and press the button. Inject an espresso pod https://coffeeeuk39639.thenerdsblog.com/33898691/check-out-how-pods-coffee-machine-is-taking-over-and-what-you-can-do-about-it