A collection of devices used in conjunction with a conduction blood/fluid warmer to heat banked blood, blood products, and intravenous (IV) fluids to a temperature appropriate for infusion into a patient. It consists of a pouch(es) or a flexible cassette through which blood/fluid flows from the infusion bag to the patient while being heated in-line by the warmer; clamps and a bubble trap may be included. The set is typically used in the operating room (OR) or in accident and emergency (A&E) situations when rapid infusion of several units of blood/fluid is necessary. This is a single-use device.