CellStor Single-Use 2D & 3D Biocontainers CellStor Single-use 2D & 3D biocontainers for more advanced applications, such as tangential flow filtration, diafiltration and in-process mixing CellBios offers a wide range of custom 2D & 3D Bags (bioprocess bags) for a variety of applications: preparation, storage and transport of bio-pharmaceutical solutions. The biocontainers are available in single layer and multi layer depending on the applications and range of volumes. The Biopharmaceutical Industry has validated two primary polymers for the contact layer of Single-Use bioprocess bags which to CellBios utilize. The first material is EVA (Ethylene vinyl acetate) which is commonly used for 2D Bags, and Bags for Rocking Platforms. The second and most widely used material is ULDPE (Ultra low density polyethylene) which is used as the contact layer for large 2D bags and 3D Bags.