The Thermo Scientific™ DynaDrive™ Single-Use Bioreactor (S.U.B.) is our latest advancement in S.U.B. technology; it offers better performance and is scalable to larger volumes than previous bioreactors. The complete DynaDrive S.U.B. system consists of a 3,000 or 5,000 L bioreactor tank and a Thermo Scientific™ DynaDrive™ BioProcess Container (BPC). This cube-shaped tank with a unique stirred-tank design utilizes a novel drive train with multiple impellers. The superior mixing capability of the bioreactor enables optimal mixing and mass transfer performance. The newly designed tank shape allows for mixing at very low volume and has a turndown ratio of 12.5:1 for 3,000 L systems and 20:1 for 5,000 L systems.