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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.
A calorimeter is a device used to measure heat of reaction. It can be sophisticated and expensive or simple and cheep. In CHEM120 Labs, a styrofoam cup is used as a calorimeter, because it is a container with good insulated walls to prevent heat exchange with the environment.