Abstract: A combination thermal shipping and/or storage container and leak-resistant bag for potentially infectious biological specimens. Two molded plastic sections press together to form a closed compartment. A slow-warming or slow-cooling composition within each section surrounds the compartment to hold the specimens in the bag within a desired temperature range for a relatively long period. A portion of the bag extends from the closed container sections for exposing any labeling imprinted on the bag. A separate pouch in the bag, accessible from outside the container, is provided for holding any documentation which is to accompany the specimens.