Nalgene Erlenmeyer Flasks Provide Superior Chemical Compatibility And Shatter-Proof Construction For Lab Reagents And Solutions In Medical And Laboratory Applications. Nalgene Erlenmeyer Flasks are made of PPCO and PETG to provide long lasting durability. Flasks handle suspension of cell culture, media preparation, mixing and storage. Break resistant. Flasks available vented or non-vented. Available styles are Erlenmeyer Flask and Sterile Single Use Erlenmeyer Flask. Closures are #7 and 45-430mm. Capacities are 500 ml and 2000ml. Colors are Clear and Translucent. Sold in package quantities of 4 and 12.