How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode at the top of the pod (which is actually an un-sealed disc of pre-dosed ground beans that are encased between two layers of filter paper). Simply insert it into the machine and press the button. https://wwwcoffeeeuk87064.thelateblog.com/28844904/5-people-you-should-be-getting-to-know-in-the-pods-coffee-machine-industry