Made of light, crystal clear PETG plastic, PEHD closure. Sterile disposable flasks reduce the chance for cross contamination. Ideal for shaker and suspension cell culture, media preparation or storage. Molded-in graduations. Leak-proof PEHD screw closures open to vent with 1/4 turn. Individually packaged for easy storage and handling. Made of light, crystal clear PETG plastic, PEHD closure. Sterile disposable flasks reduce the chance for cross contamination. Ideal for shaker and suspension cell culture, media preparation or storage. Molded-in graduations. Leak-proof PEHD screw closures open to vent with 1/4 turn. Individually packaged for easy storage and handling.