2D vs. 3D Bioprocess Bags — Selection Guide
Not sure whether your process needs a flat 2D bag or a 3D bioreactor bag? This guide compares both formats by application, oxygen transfer needs and working volume to help you choose.
Head-to-head comparison
| Parameter | 2D Bags | 3D Bags |
|---|---|---|
| Geometry | Flat, pillow-style | Three-dimensional, bioreactor-style |
| Primary purpose | Media/buffer prep, mixing, storage | Cell culture, fermentation |
| Oxygen transfer | Not optimised — not designed for cell growth | Optimised for gas exchange and cell growth |
| Typical volume range | 150 mL – 50 L | 100 L – 1000 L |
| Platform compatibility | Orbital shakers, rocking platforms | Rocking, orbital bioreactor platforms |
| Mixing efficiency | High — large flat surface area | Optimised for culture, not bulk mixing |
| Best for | Buffers, media, intermediate storage | mAb, vaccine, cell therapy production |
Choose 2D bags if you need
- Media or buffer preparation — flat geometry maximises mixing efficiency on shakers and rocking platforms.
- Bulk intermediate storage — efficient use of space for non-culture process steps.
- Powder reconstitution — large surface area supports efficient dissolution and mixing.
- Transport between process steps — flat format is straightforward to handle and transport.
Choose 3D bags if you need
- Mammalian cell culture — geometry and surface design support the oxygen transfer cell growth requires.
- Microbial fermentation — sustained gas exchange for bacterial or yeast culture at scale.
- Viral vaccine or VLP production — bioreactor-grade containment for sensitive production processes.
- Larger-scale production — volume range extends well beyond typical 2D bag capacity.
Still not sure which format fits your process?
Many bioprocesses use both formats at different stages — 2D bags for upstream media and buffer preparation, 3D bags for the culture or fermentation step itself, and tank liners or container systems for bulk downstream storage. If your process sits between these categories, or involves a low-shear, microcarrier-based culture, our Rocker Bags may be the more suitable option. Contact our team with your process details and we can help match the right format.
Need help selecting the right bag format?
Contact our team with your process details — we'll help you choose the right format and volume for your application.
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