How to Choose a Coffee Machine For Pods Pod machines work by reading the barcode at the top of the pod (which is actually a sealed disc pre-dosed ground beans that are encased between two layers of filter paper). Simply insert it and push the button. Put in an espresso https://coffeee38508.onesmablog.com/a-trip-back-in-time-how-people-talked-about-pods-coffee-machine-20-years-ago-68703054