Explain using thermodynamic terms and theory why coffee cups

Explain, using thermodynamic terms and theory, why coffee cups used for takeaway have a cardboard outer sleeve that can be added. What does having a small drink opening in the lid offer?

Solution

>> To prevent any damage, when hot drink in these gets spilled , i.e. to make these cups more safer, Jay Sorenson, invented the Java Jacket, an insulated cardboard sleeve that slides over a paper coffee cup. Paper-cup manufacturers, meanwhile, developed double- and triple-walled cups that improved insulation.

>> This is like, adding an extra surface (like fin) to increase the heat dissipitation and to keep cool.

>> There is a small drink opening in the lid whose use is to cool the hot drink before it reaches to your mouth.

Also, lid has a depression so that, your nose does not always strike with lid every time you try to takeasip....