Which of the following would have the best thermal insulation properties.

From the above options, the best Thermal insulator will be a Plastic cup. Thermal insulators resist to conduct energy or reduction of heat transfer when objects come across in contact with radiation or higher heat object.

The best insulator in the world right now is most probably aerogel, with silica aerogels having thermal conductivities of less than 0.03 W/m*K in atmosphere. of aerogel preventing ice from melting on a hot plate at 80 degrees Celsius! Aerogel has its amazing properties because it's mostly made out of air.

One of the best commercially available choices of insulation material for fishing vessels is polyurethane foam. It has good thermal insulating properties, low moisture-vapour permeability, high resistance to water absorption, relatively high mechanical strength and low density.

Explanation: