Here we present a protocol for using O-shaped vessels, specialized for suspension cultures of cellular aggregates, with orbital shaking. The HEK293 cells grown in this bag form more homogeneous aggregates than those grown in conventional culture vessels.
Horiguchi, I., Suzuki, I., Morimura, T., Sakai, Y. An Orbital Shaking Culture of Mammalian Cells in O-shaped Vessels to Produce Uniform Aggregates. J. Vis. Exp. (143), e57922, doi:10.3791/57922 (2019).