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    Portable double walled vacuum insulated tanks such as "Little Maggie" are used in the laboratory for holding liquid nitrogen for the essential, safe cryogenic freezing process of samples that will be stored at -196 °C (-321 °F) in liquid storage and -193 C. (-315 °F) in vapor storage, at the U.S. Department of Agriculture (USDA), Agriculture Research Service (ARS), National Center for Genetic Resources Preservation (NCGRP), in Ft. Collins, CO, on Wednesday, Nov. 6, 2013. USDA photo by Lance Cheung.

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