How to Choose a Coffee Machine For Pods Pod machines work by reading the barcode on the top of the pod (which is actually an un-sealed disc of pre-dosed ground beans that are encased between two layers of filter paper). It is easy to insert it and push a button. https://www-coffeee-uk91567.canariblogs.com/10-things-you-learned-in-kindergarden-that-will-aid-you-in-obtaining-pods-coffee-machine-43702837