What is the largest single-use bioreactor for mammalian cell culture you have actually seen? Not an illustration, actual construction.

UPDATE: This week ABEC unveiled the newest member of its CSR product family,  a 6,000L working volume single-use bioreactor. 

That distinction would go to the 4,000L working volume CSR product line from ABEC. They actually brought a completely constructed, not an illustration, CSR bioreactor to Interphex in NYC. It is my understanding that Wuxi Biologics has implemented the platform at the commercial manufacturing facility it is constructing in China.