How to Choose a Coffee Machine For Pods Pod machines operate by reading the barcode at the top of the pod (which is actually a disc of sealed, pre-dosed ground beans that are encased between two layers of filter paper). Simply insert it into the machine and press the button. https://coffeee-uk87516.affiliatblogger.com/80621458/how-to-explain-best-pod-coffee-machine-to-your-grandparents