How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode on the top of the pod (which is actually a disc of sealed, pre-dosed ground beans that are encased between two layers of filter paper). It is easy to insert it and press a button. https://coffeee21852.goabroadblog.com/27922609/10-no-fuss-strategies-to-figuring-out-your-pods-coffee-machine