Abstract: Containers are provided. An exemplary container for storing an item comprises: an insulating material defining an interior, the insulating material comprising a bio-based polyurethane; and an outer shell located about at least a portion of the exterior of the insulating material, the outer shell comprising a bio-based polyurethane. The bio-based polyurethane is made from a first component, which may be one of either an isocynate or a rubinate; a second polymer component, which may be a vegetable oil, and blowing agent 254. A bio-based polyurethane made with blowing agent 254 tends to produce a product with good insulating characteristics.

Abstract: Containers are provided. An exemplary container for storing an item comprises: an insulating material defining an interior, the insulating material comprising a bio-based polyurethane; and a temperature-maintaining material disposed within the interior, the temperature-maintaining material being arranged to maintain a temperature of an item placed with the interior. Methods also are provided.

Abstract: Containers are provided. An exemplary container for storing an item comprises: an insulating material; a pressure-maintaining container defining an interior, the pressure-maintaining container being surrounded by the insulating material; and a temperature-maintaining material disposed within the interior of the pressure-maintaining container, the temperature-maintaining material being arranged to maintain a temperature of an item placed with the container. The temperature-maintaining material sublimates during warming to produce sublimation gasses and the pressure-maintaining material is operative to control venting of the sublimation gasses such that pressure higher than atmospheric pressure is maintained about the temperature-maintaining material. Methods also are provided.