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 beans that are encased between two layers of filter paper). It is easy to insert it and push a button. https://www-coffeee-uk74671.myparisblog.com/28808501/11-ways-to-completely-revamp-your-best-pod-coffee-machine