3D mixing bag is a product specially developed for liquid-liquid and liquid-solid mixing in the biopharmaceutical process. The bags are available from 2 L to 3,000 L, and can be customized according to customers’ requirements. The DuoFilm-001 film used in these bags is 7-layer laminated bio-specific film with a thickness of 0.3 mm, and the liquid contact layer of ULDPE provides excellent physicochemical and biocompatibility properties. Lianghei 3D liquid storage bag fully complies with cGMP and biopharmaceutical operation requirements in terms of raw materials, product assembly, and sterilization processes.