How to Choose a Coffee Machine For Pods The pod machines read the barcode on the top of the pod (which is actually an un-sealed disc of pre-dosed ground coffee compressed between two layers of filter paper). It is easy to insert it and press a button. Inject an espresso https://coffeeeuk74204.blogdeazar.com/28458238/this-is-the-new-big-thing-in-pods-coffee-machine