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 that is pressed between layers of filter paper). It is easy to insert it and press a button. https://coffeee-uk48614.amoblog.com/the-reasons-you-re-not-successing-at-pods-coffee-machine-50225110