Half a croissant, on a plate, with a sign in front of it saying '50c'
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Thermoelectric Blanket

All-Season.
  (+7)
(+7)
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Says "Hot" on one side and "Cold" on the other.
FlyingToaster, Feb 06 2014

[link]






       You would have to fold the top of the blanket back, to avoid the cold shoulder.
erenjay, Feb 07 2014
  

       Hmm, I don't actually see that as a problem unless the shoulder is the only point of contact.
FlyingToaster, Feb 08 2014
  

       upside and downside.
FlyingToaster, Feb 08 2014
  

       The deluxe model has a chest for heating or cooling your drinks.
popbottle, Feb 08 2014
  

       I'm awed beyond the ability of one + vote to express with how simple and cool (no pun intended) this idea is!   

       So would the blanket just something like a sort of brigantine of chunky Peltier modules with lots or wires running to them, sandwiched in crinkly Mylar, or to somehow make the whole thing flexible and homogenous?   

       A side application would be that, removing the power supply, you could use one rolled into a sleeping bag as a generator to charge your small electronics using your body heat – quite the boon for outdoors folk with a need for ever present radio and IT connectedness.
CraigD, Feb 08 2014
  

       There doesn't seem to be a soft, furry material for Peltiers, so I'd go with a large number of extremely small disks, say 1cm area - sequins really - covered with a fabric just thick enough to keep the little disks from being noticeable.
FlyingToaster, Feb 11 2014
  
      
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