There are 3 spoilers in the middle of the bottom of the bottle, which can increase the dissolved oxygen transfer of the medium. Note: Do not heat directly!
WHEATON 3883-03 Culture Flasks, Shake Flasks, Shinetek Instruments Research Institute (CAT#-STEM-CC-3364-LGZ) WHEATON 3875-31 Culture Flask, Three Baffles, Without Lid, Shinetek Instruments Research Institute (CAT#-STEM-CC-3359-LGZ) WHEATON 3877-30 Culture Flask, Three Baffles, Screw Cap, Shinetek Instruments Research Institute (CAT#-STEM-CC-3360-LGZ) WHEATON 3877-45 Culture Flask, Three Baffles, Screw Cap, Shinetek Instruments Research Institute (CAT#-STEM-CC-3361-LGZ) WHEATON 3879-18 Culture Flask, 38mm Neck, without Cap, Shinetek Instruments Research Institute (CAT#-STEM-CC-3362-LGZ) WHEATON 3879-30 Culture Flask, 38mm Neck, without Cap, Shinetek Instruments Research Institute (CAT#-STEM-CC-3363-LGZ)