The quick answer is no, not all coffee pods fit in all machines. There are a few reasons for this. First, the pod itself may be a different size than what the machine is designed to accommodate. Second, the pod may not have the right type of attachment mechanism to work with the machine. Third, the pod may not be compatible with the machine's brewing system. That said, there are ways to get around these problems. One option is to find a coffee pod adapter that will allow you to use any type of pod in your machine. Another option is to buy a coffee machine that is specifically designed to use coffee pods. Either way, you'll be able to enjoy your favorite coffee without having to worry about compatibility issues.