Designed for long-term storage and easy sample retrieval. Safely store samples up to 7 months without replenishing liquid nitrogen. Each vessel includes six canisters. Durable construction and super vacuum insulation provide for years of trouble-free service and a uniform temperature environment for specimen storage. A secure locking hasp prevents unauthorized entry. In addition, the Bio-Cane 20 has polycarbonate lids and 20L capacity. Included in each order are six canisters to accommodate any combination of cryogenic vials, tubes or sample containers, which must be ordered separately and are not included.