A stirrer for an individual-specific cosmetic manufacturing selling machine for stirring liquid cosmetic raw materials injected into a container is capable of rapidly and thoroughly mixing various types of cosmetic raw materials having different viscosities through a combination of rotation and revolution and a centrifugal force. The stirrer includes a ring-shaped outer gear, a motor configured to rotate the outer gear, an inner gear assembled on an inner circumferential surface of the outer gear to make a planetary motion, and a container fixing member provided above the inner gear and configured to fix the container, wherein the container fixing member is configured to make rotation and revolution to stir the raw materials injected into the container.

The present disclosure relates to an extrusion apparatus comprising: a) a planetary roller extruder; b) a melt pump arranged downstream of the extruder; c) optionally, a fluid feeding equipment; d) a static cooling mixer equipment arranged downstream of the melt pump; e) a foaming equipment arranged downstream of the static cooling mixer equipment. The present disclosure also relates to a process of manufacturing a foamed polymeric composition and uses thereof.