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What makes good cold insulators?
St. F rancis Xavier, Canada
Styrofoam is a good thermal insulator, meaning that it's hard for heat to flow through it.
Thermos bottles are also pretty good. They have a vacuum between
two reflecting glass surfaces. See our other answers on this site about
how styrofoam and thermoses prevent conduction, convection, and
(republished on 07/27/06)
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