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tin cup
Styrofoam cups and caps. It keeps the heat in.
Heat will do it
It is the Styrofoam cup as it is not a good conductor of heat but the metal cup is a good conductor of heat.
Styrofoam is an excellent insulator.
A Styrofoam cup will do both. The Styrofoam is an insulator, and, as such, it slows the transfer of heat between the system (the drink) and the surroundings (everything outside the cup) If it is a cold drink, heat moves very slowly through the cup toward the drink. If it is a hot drink, heat moves very slowly through the cup toward the surrounding air.
styrofoam, but warning fammable and unsafe for the environment!
200,000 joules of heat are needed to produce a single styrofoam cup. In order to simulate the waste of a styrofoam cup, its ceramic counterpart would have to be used 70 times or washed over a thousand times to offset the loss of heat in one styrofoam cup.
1.3 kJ/(kg·K)
By keeping it in the styrofoam cup. Covering it up may help avoid heat from coming in.
a cup made out of styrofoam...........................................................................................................................................................................
If the Stainless Steel cup has no insulation the Styrofoam cup will keep it warm longer.