Volumetric Flask, 100mL. Flasks are manufactured from virgin FEP , which is highly resistant to heat and chemical contamination. FEP surface properties offer superior cleanability to glass, PTFE and polypropylene containers, reducing risk of sample carryover in trace analysis applications. These beakers are suitable for sterilization using heat, gas, and chemical methods for sensitive biological applications. Screw cap design provides reduced contamination risk, compared to traditional stopper design.