Innovation for the long-term protection of your precious samples. You’ve spent days, months, even years getting your research and analysis to this point . . . don’t risk losing your precious samples to something as simple as a problematic o-ring! Even the best o-rings can dislodge, deform or become brittle, resulting in sample loss and contamination. Globe Scientific CryoClear™ vials feature an innovative polyethylene (PE) screw cap that is co-molded with a layer of thermoplastic elastomer (TPE). This special manufacturing process provides the leak-proof benefits required, while eliminating the risk of contamination and sample loss associated with the use of separate o-rings.