Wolf-Pak® 3 Liter Back Pack Pump Pouch. Single-use, disposable infusion bags designed with your patients in mind. Our durable pouches are economical and stylish for patients receiving outpatient TPN, PCA, antibiotic, chemotherapy and other infusion therapies. The pouches are compatible with most ambulatory infusion pumps, including: CADD Legacy, CADD PCA, CADD Prizm, Sapphire, and Curlin Pumps.