Fluid processing sets and organizers for the same

A disposable fluid processing set comprising:

• a first portion comprising at least one container;
• a second portion comprising at least one container;
• wherein said first and second portions are integrally connected by a plastic tube;
• an organizer for receiving said second portion, said organizer comprising a folded sheet of a flexible material, wherein the facing sheet portions are secured to each other.

A disposable fluid processing set comprising:

• a first container including an inlet and an outlet and a treating agent within said container;
• a tube with one end communicating with said inlet and defining an openable flow path;
• a second container;
• a tube with one end communicating with said first container outlet and the other end communicating with said second container and defining an openable flow path between said first and second containers.

A disposable fluid processing set for treating a biological fluid comprising:

• a first portion comprising a container for containing a biological fluid during treatment;
• a second portion comprising a container for receiving said biological fluid after treatment;
• a tube connecting said containers and defining an openable flow path between said containers, and
• a holder for temporarily holding said second portion separate from said first portion during a processing step.