How to Choose a Coffee Machine For Pods Pod machines work by reading the barcode at 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). It is easy to insert it and press a button. https://coffeee-uk88247.ambien-blog.com/34517149/7-simple-tricks-to-totally-rocking-your-pods-coffee-machine