How to Choose a Coffee Machine For Pods Pod machines work by reading the barcode that is on the top of the pod (which is actually an un-sealed disc of pre-dosed ground coffee that is pressed between two layers of filter paper). You simply insert it and press a button. https://coffeeeuk87527.aioblogs.com/82026833/pods-coffee-machine-11-things-you-re-forgetting-to-do