We have separated the components of these make up pots so indivdual's are able to design based on their needs. To make the combination of stackable pots you simply choose the number of lids, bases (top thread only) the number of middles (top and bottom thread) that you require for your desired configuration. You can have one base per lid, a number of stackable middles and a lid, or a base, number of middles and a lid.