We offer two versions of cryovials - our heavy duty cryovials feature a fast open design, rigid bottom for one handed open or close, and designed for storage to -196 degrees celcius. Our new CryoCert silicone seal cryovials are certified DNase, RNase, Pyrogens and human DNA free. CryoCert cryovials also allow one handed opening and closing by using a special storage rack sold separately.