How to Choose a Coffee Machine For Pods Pod machines scan the barcode located on the top of each pod (which is an undosed disc of sealed ground coffee, pressed between layers of filter paper). Simply insert it into the machine and press the button. Pop in an espresso pod, and the machine goes into action, producing richly dark crema-topped coffee within 30 minutes. The pods are placed in a receptacle that is attached to the machine, allowing for easy disposal. ...