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 the button. https://coffeee-uk01146.blog2freedom.com/28353700/watch-out-how-pods-coffee-machine-is-taking-over-and-what-you-can-do-about-it