to all you coffee drinkers

For my engineering design course, I am thinking about coming up with a product that actively warms/cools up a cup of coffee to a desired temperature.
The product may resemble a thermos, and will be portable and rechargeable.
Would you be willing to spend about 15-20 dollars on a mug/thermos that actively warms your coffee at a desired temperature so your coffee is always hot?
Your comments would be very appreciated.
Thanks, Gautam
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Gautam Jain
In article ,
This seems to be an answer to a question that no one asked. First, rarely is it an issue that the coffee must be *cooled* to a desired temperature. Second, existing thermoses can adequately keep coffee hot for a large portion of the day. Why heat it?
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