Various beverage preparation machines having a multi-chambered basket unit are shown. The basket unit can be configured to accept multiple cartridge configurations. For example, some embodiments are configured to receive a first cartridge configuration in a first chamber of the basket unit and a second configuration in a second chamber of the basket unit. In various embodiments, the basket unit can rotate to allow selective accessibility of the first and second chambers. This can facilitate loading the cartridges into the appropriate chamber, such as loading the first cartridge configuration into the first chamber and the second cartridge configuration into the second chamber.