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Microwave Thermos

Mini microwave emitter screws into top of thermos bottle
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Thermos bottles can keep foods and drinks hot for a long time, but not indefinitely. Microwaves are great for reheating things, but they can't heat thermoses.

To overcome these limitations, I propose a special thermos bottle lid, with a microwave embedded into it.

When you want to consume the contents of the thermos, you simply press a button on the outside of the lid, and the rechargable battery (or capacitor) powers the microwave for several seconds.

A digital thermometer lets the user know how hot the food is, and a digital thermostat can be used instead of a timer, to control how long the reheat process is active.

To conserve battery life, the thermos can also be operated while plugged into an electrical outlet.

goldbb, Jun 08 2009

You gotta Google, dude! http://www.amazon.c...0-47L/dp/B000OW2HV4
[21 Quest, Jun 08 2009]

This one plugs into a car charger and heats up http://www.topofthe...ffee-maker-12v.html
[21 Quest, Jun 08 2009]

This one heats up with a USB cord http://www.edmwi.co..._cup_stainless.html
[21 Quest, Jun 08 2009]

Plugs into a computer or vehicle power socket http://www.ecogeekl....com/heatedmug.html
[21 Quest, Jun 08 2009]

[link]






       //Microwaves are great for reheating things, but they can't heat thermoses//   

       Actually, they can. Many thermoses these days are made without metal liners, using all-plastic construction, and some *are* labelled as microwave safe.
21 Quest, Jun 08 2009
  

       It's a bit catch 22 then as without metal liners, this would need microwave thermoses ten safety tips.
bigsleep, Jun 08 2009
  

       I Googled "microwave safe thermos" and got a whole bunch of hits. Nothing like this particular idea, but they do exist.   

       Edit: found lots of heated thermoses and travel mugs that plug into everything from a vehicle power socket to a computer USB port.   

       I have severe doubts about how warm a microwave emitter that small is going to get a thermos-full of anything. Microwaves are pretty power-hungry.
21 Quest, Jun 08 2009
  

       Ok, maybe instead of saying "thermos," I should have said, vacuum flask or dewar flask.   

       Wikipedia says, "Thermos, their tradename for their flasks, remains a registered trademark in some countries but was declared a genericized trademark in the U.S. in 1963 as it is colloquially synonymous with vacuum flasks in general. In fact, it is far more common for Americans to use the term thermos than vacuum flask." Since I'm an American, I hope you'll forgive me for using "thermos," when I meant vacuum flask.   

       That first link points to a foam insulated container, which is made under the Thermos brand label, but is not a vacuum flask (it uses foam insulation). Perhaps more importantly, it doesn't have a microwave in it... it is merely microwave safe.   

       None of the other links even indicate how they're insulated.   

       Naturally, any stainless steel vacuum thermos, or metallized glass vacuum thermos, cannot be put inside of a microwave (or at least, not with useful results).   

       However, if the microwave emmiter is inside of the flask, the reflective metal (or metallized glass) interior should be perfect for ensuring that any microwaves which pass through the top region of the food, will reflect in a way that gives them another chance to reach the food.
goldbb, Jun 09 2009
  

       You're splitting hairs a bit, BB. If a foam -insulated flask can be microwaved, then so can a vacuum flask. I thought that was obvious enough not to need mentioning. And I realize they don't have a miniature microwave emitter in them. That's probably because batteries small enough to fit conveniently onto a thermos can't generate the power needed to heat a thermos-full of liquid. How bulky are the rechargeable battery and microwave emitter going to be? I'm guessing inconveniently so. Better to get a plug-in than try to heat it all the way up from room temp or cooler with such a small device.
21 Quest, Jun 09 2009
  

       As far as I know, all vacuum flasks are either made of metal, or are made of glass with a metal coating.   

       If you stick one in a microwave oven, that metal will reflect the microwaves, preventing the contents of the flask from being heated.   

       The reason a foam insulated flask can be microwaved is that the microwaves pass right through the foam as if it weren't there.
goldbb, Jun 09 2009
  
      
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