The present invention is a method of freezing cells comprising the steps of incubating said cells in a solution comprising a cryoprotective agent, concentrating the cells resulting from the previous step withdrawing the eluent essentially free of cells, and freezing the resulting concentrated cells. The cells frozen by the inventions method render a high post-thawing viability, reduce cryoprotectant related toxic events and promote cells life in a suspension state after thawing. The invention also comprises the container comprising the frozen cells.
