Bottom baffle increases air exchanging efficiency, reduces cell division and makes oxygen dissolving more sufficient; the smooth bottle body lowers the risks of cell attachment and culture solution bubbling; Its individual package is more convenient and can avoid cross infection; ISBM is adopted to avoid surface marks or cell collision and cracking; surface finishment similar to mirror surface, permeability approaching glasses, lowered risks of cell attachment; Electron beam sterilization, SAL=10°, DNase/RNase-free, non pyrogenic, non-cytotoxic.