InVitro Roller Bottle features an ergonomic HDPE Quick Action vented closure, available on the InVitro 1.2× PETG Vented Roller Bottle. The hydrophobic, 0.22 μm chemically resistant membrane within the vented closure allows for sterile gas exchange in CO
2 incubators, making the bottle ideal for use with cell lines requiring additional CO
2, or for use with media containing high levels of sodium bicarbonate. Closures for the 1.2× Vented Roller Bottle are available separately, and are sterilized and individually wrapped.