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Reusable handwarmers

 
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mindmetoo



Joined: 02 Feb 2004

PostPosted: Thu Nov 17, 2005 4:04 am    Post subject: Reusable handwarmers Reply with quote

Have you seen them in cute Korean stationary stores? They appear to be a little robot or ginger bread man with some clear liquid and a small metal disk. You quickly snap the disk 3 or 9 times and then liquid becomes a solid, producing heat via some chemical reaction. It produces a nice amount of heat for about 10-15 minutes. Enough for your walk to the subway. You then put it into some boiling water for about 6 minutes and it returns it to a liquid state. Not sure if you can microwave it given the metal disk.

Pack four. Two for your trip to the subway, two for your trip back home.

You can see a demonstration here:

http://www.nahpco.com/heat_packs_small.htm

Here's some science on it:

http://www.stevespanglerscience.com/experiment/00000078

DIRTYSANCHEZ, THIS PRODUCT IS NOT PROOF OUR TECHNOLOGY HAS BEEN GUIDED BY SPACE ALIENS!

I wonder if the heating process is similar to the MRE self heating process.

In my quest for cute little gifts for friend and family back at home, I stumbled on these things. Given Canada and Winter, I can see them being most welcome. And the cute Asian cartoon character form they take only makes it a cooler gift for my friends who are mostly in the funky side of software development.... ya know?
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joe_doufu



Joined: 09 May 2005
Location: Elsewhere

PostPosted: Thu Nov 17, 2005 4:26 am    Post subject: Reply with quote

We had those in winter in Maine, but they were big ones, not really pocket sized. I can't remember if we got them because Mom and Dad were part time employees at the local ski mountain (most of the town worked there to get free tickets) or because they were part timers on the local ambulance service (the #1 cause of 911 calls was hypothermia).

What you do is you boil them to recharge.
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Qinella



Joined: 25 Feb 2005
Location: the crib

PostPosted: Thu Nov 17, 2005 6:54 am    Post subject: Reply with quote

Oohhh.... so when you boil them, they become liquid again? Okay, man I'm glad to find that out. I have five of them sitting around my apartment, because I assumed that once you reheat them, they would only stay hot for immediately following minutes.

Gonna go recharge mine now for tomorrow!

Btw, if anyone wants these, they're called �ճ���, which is pronounced "son nalo" (the 3rd �� is pseudo-silent). Just go to a school supply store and get them for a buck.

Q.
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Pangit



Joined: 02 Sep 2004
Location: Puet mo.

PostPosted: Thu Nov 17, 2005 1:28 pm    Post subject: Reply with quote

Science is neat.
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Ya-ta Boy



Joined: 16 Jan 2003
Location: Established in 1994

PostPosted: Thu Nov 17, 2005 1:33 pm    Post subject: Reply with quote

Do you think I could strap them to my feet? The heat is on in our building but my tootsies are still cold.
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mindmetoo



Joined: 02 Feb 2004

PostPosted: Fri Nov 18, 2005 1:23 am    Post subject: Reply with quote

joe_doufu wrote:
We had those in winter in Maine, but they were big ones, not really pocket sized. I can't remember if we got them because Mom and Dad were part time employees at the local ski mountain (most of the town worked there to get free tickets) or because they were part timers on the local ambulance service (the #1 cause of 911 calls was hypothermia).

What you do is you boil them to recharge.


They seem pretty inexpensive here. I'm not sure how much they would charge in the USA but it strikes me as the kind of thing they would have made in china for 25 cents and sell for $10 each.
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