Usually food it packed in Styrofoam to keep it cold (or
warm)
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Styrofoam cups because of what they are made up of
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styrofoam stupid
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Styrofoam because it has a thick layer and is a good
insulator.Paper and plastic are could alternatives but Styrofoam
would work better, therefore glass would be the worst one to use
because it would only keep it warm for a couple of minutes.