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. CryoClear™ cryogenic vials feature an innovative polyethylene (PE) screw cap that is co-molded with a layer of thermoplastic elastomer (TPE). This offers the benefit of giving exemplary sealing while helping eliminate the risk of contamination or sample loss associated with o-rings. Store your samples with confidence using CryoClear™ cryogenic vials: the best and most leak-resistant cryogenic vials available for long-term storage.