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Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
Example using conduction through a picnic cooler: A StyrofoamÂ® box used to keep drinks cold at a picnic has total wall area (including the lid) of 1.2 mÂ² and a wall thickness of 1.6 cm. It is filled with ice, water, and drinks at 0.0Â°C.