Warning: Do not use CryoClear™ vials in the liquid phase of liquid nitrogen; Packaging: CryoClear™ cryogenic vials are sold in heavy-duty, tamper evident resealable plastic bags. Each bag labeled with manufacture date and barcoded lot number for traceability. Sold in Bag of 50 vials or Case of 500 vials (50/Bag - 10 Bags/Case).