To PeterH: Don't get me wrong, I appreciate all the posted replies. The thing about the Peltier, someone already made a beer cooling system but it's way too bulky and inconvenient. In fact I am trying to mock up this heating/ cooling idea. Maybe I haven't explained it right, if that's the case I apologize for that.
To officialxian: That's just awesome. It really helps, thank you. Can I also hook up the temperature readings to a LCD screen?