A U.S. Patent for “Methods and Apparatus for Processing Fluids” was awarded to Life Technologies on January 7th, 2020. The present invention is a method for processing a fluid includes removably securing a retention member to a vessel that bounds a chamber; inserting a collapsible bag within the chamber of the vessel; securing the bag to the retention member so that the bag is supported within the chamber of the vessel; and dispensing a fluid into a compartment of the collapsible bag supported within the chamber of the vessel. The fluid can be mixed within bag while the bag is disposed within the vessel. Learn More