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Using an Radioisotope heater unit(RHU), used to heat spacecraft in the deep cold of space, embed it within a thermos flask to keep the content hot or at least warm for a long long time.
Unlike a spaceflight, we wont need such a big pellet. A coin cell is likely to be enough to keep the content pretty
damn hot. The extra space can then be better used for creating extra radiation shielding.
It is perfectly safe as the pellet doesn't have to be in direct contact with the content, it can just be inserted into a cavity underneath the flask. (Which means easy replacement when the 10 years lifespan is up!)
Of course, if you feel excessive heat building up on the outside of the flask, its probably over 500degrees inside the flask. In that case you should start worrying and come see us, because that's not supposed to happen. But don't worry! This thermos has a 10 year warranty. We'll ship you a replacement instantly! Frankly you should be paying us!
[mofosyne, May 10 2011]
[mofosyne, May 10 2011]
[pocmloc, May 10 2011, last modified May 11 2011]
Alternative design suggestion
[pocmloc, May 10 2011]
Perfectly place to store your thermos [metarinka, May 11 2011]
Another design suggestion
In America we supersize everything. [DIYMatt, May 12 2011]
Hello Kitty design suggestion
For [xandram] [pocmloc, May 15 2011]
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||Well, no pyrotechnics, but still [+].
||Waiting for these to appear on the market and be
snapped up by would-be terrorists, to make dirty
||[Infidel], they'd never,ever do that beause then they'd have to
drink their beverages cold. They're not going to be motivated and
wound-up for their suicide bombing mission by a couple of
mouthfulls of cold coffee, are they?
||[+] OK - I like to learn about this stuff from you smart guys, but I would like one with an untradional shape...you know, thermos shapes are kind of boring.
||Not really related to this but ... I read a great story yesterday about one of the people who witnessed one of the early A-bomb tests in the Nevada desert. He got a small parabolic mirror from his lab and pointed it at the blast site with a cigarette positioned at the mirror's focus. So, after the blast he was able to tell people that he had lit his cigarette with an A-bomb.
||[x], perhaps it should be smooth, spherical and black, with the cap protruding from one side, and a cord attached to the centre of the cap (to help you pull it off I suppose).
||You could switch it from heating mode to charging mode, and plug your phone into it! You could put a phosphor screen on the bottom and make a flashlight! You could place it end-to-end with a friend's, and make a criticality! +++
||Fun concept but RHU's don't throw out enough heat, most are designed to give out way less than 100 w, usually in the 1-25w range. I think one that did give off a useable amount of heat would also probably give off useable amounts of radiation. Guess you wouldn't have to worry about the hot coffee spilling in your lap...
||That being said it's the perfect thermos to take in your nuclear balloon (see link)
||[pocmloc] cute, but I was thinking more like Hello Kitty!
||[metarinka] You would only need about 4 watts to keep the contents of a thermos flask close to 100ºC.