Are these oxygen reactive? If I open this and it gets warm, but then seal it in a jar will it cool off until I open the jar again?
611900
I'm not sure about putting them in a jar and it will keep them from staying warm. I do however know that they take a few minutes to react and they will stay warm for a long time. While visiting Canada in the winter I was able to use the hand warmers for two days in a row; meaning they stayed warm (pretty hot) overnight and I was able to still use them the following day.
1777886
I agree with the others... I keep them in a kitchen cabinet at room temperature (well away from the stove/oven). Never had any problems.
1826843
THEY ARE NOT AIRTIGHT!!!! Good for crafts or buttons I guess? The plastic seal between the metal cap and the jar is not designed to be airtight seal.
1651306
I never noticed the "refrigerate after opening" until I read this question and I never refrigerated any of the bags I have bought and enjoyed over the last 8 months. They are so good that I don't have them open too long. Also I frequently store them in a glass jar with a lid to keep out any exploring bugs.
476073
I don't think any plastic bottles are truly safe to use with a warmer even with the bottles being BPA-free, but that being said-- I think this one doesn't really get that hot and it has a shut-off, so I think it wouldn't cause the bottle to melt or anything drastic like that. Because I have to scald my milk, I have another warmer that gets much hotter and so I had bought two metal bottles to use and I always just use those with any warmer now.
601478
The are one time use, however... I have found that I can wear them in my leather gloves during the morning drive, then wrap my glove tightly with the warmer inside and put it in my pocket... 9 hours later, I still have some heat left for the drive home. The key is limiting the oxygen exposure. I suspect that if I were to put the previously opened packs in a plastic bag while I'm at work, they'd be even warmer for the drive home.
71815
As many have said, only refrigerate after opening. I normally purchase two or three at a time to save on shipping costs. The unopened jars stay in our pantry (unrefrigerated) until opened. They have always stayed fresh and were wonderful once opened. I hope you enjoy the ink as much as we have. Best of luck to you.
356730
I have kept them a couple of months and they were still good. Don't know if there is a problem with time. They wouldn't last as long if kept in a hot place. I keep them in a pantry that is pretty cool.
1576425
You can save them by sealing them in a Ziploc bag and squeezing out the excess air. http://www.heatfactory.com/english/how-to.php "If the heating time is not complete, all Heat Factory Warmers may be saved by placing them in an airtight container. The remaining time can be used later (preferably within one week). For example: A 12 hour Glove Size Warmer can be used for 6 hours one day, stored in an airtight container, then used for approximately 6 hours another day within the week. Zip lock bags with the excess air squeezed out work the best." Why this works: The chemical reaction that occurs inside the hand-warmer is the rusting of iron powder. Because the rusting process occurs rapidly, a noticeable amount of heat is generated. When iron rusts, it combines with oxygen in the air. If you seal the hand-warmer in an air-tight bag, however, the reaction will stop because all the oxygen in the bag gets used up. The website says this may not work if you store the pad for more than a week. This might be due to the Ziploc bag not making a perfectly air-tight seal. Perhaps small amounts of air leak in over time . . .
1452911
There are two consumable parts in this type of bag sealer: The metal strip which acts as the heating element, and the teflon foil which lays over this heating strip so that the heating element does not come into direct contact with the plastic bag you are sealing and just melt right through it. How long these last depend on how much you use the sealer, and what setting you use. No company is ever going to warranty consumable items such as these. The unit comes with one spare of each item, and additional heating strips/teflon covers can be purchased separately. I have used similar sealers ( not this exact model, but the picture looks identical to the one I use, except mine has a sliding cutter attachment) to seal mylar bags for long term food storage. They do a good, but not great, job. The seal is a bit thinner in width than is optimal for sealing mylar bags (~ 1/8 " wide, when ~ 1/4 " wide seal is best). I seal twice, slightly offset, to be sure of the seal. The use of oxygen absorbers will create a light vacuum overnight (assuming you press out as much air as you can before sealing), and the presence of this vacuum is a good test of the seal. I get &gt; 95% success in creating a vacuum-tight seal this way, as long as the heating element and teflon foil are in good condition.
148839
Yes, it is definitely warm. I have never had a problem. They do wear out after 9 mo to a year. They get kind of funky and my husband thinks they could be a fire hazard when old. I don't think so but replace to keep him happy. I swear by these to keep low stress w my feisty 3!
1953173
The instructions say to put the filled jars in a boiling water bath for 10 min. Be sure they are sealed. It says they last about 3 weeks once opened. I would think they would last much longer if they are refrigerated. My freezer jams too. I do cook the fruit to make it the consistency of jam, but mine last a long time in the frig. It works great!
522412
I am not sure exactly what you are asking, so I will answer both possibilities. When using and sealing Mylar bags to store dry food such as rice, beans, pancake batter, etc. I seal most of a bag and then insert the oxy-absorber (one or more per bag depending on size) just before sealing the last section of the top of the mylar bag. Since the oxy-absorbers always seem to come in sealed packs of 10 or 20 at a time, and they need to be sealed as soon as possible before they get used up by the surrounding oxygen in the air, I use a stainless steel mason jar with a quick-seal glass lid that has a rubber seal to hold them once the original bag of oxy-absorbers is opened. As each Mylar bag is ready, I pop open the lid of the mason jar, grab the oxy-absorber and slide it into the mylar bag, then quickly seal the bag shut. The mason jar gets closed as fast as possible with each oxy-absorber taken out. The other possible answer has to do with saving the unused oxy-absorbers after all the mylar bags are done in one sitting. I haven't tried to do this, though I did once complain to a company that makes the oxy-absorbers that they should sell them in smaller sealed packages so you don't have to use all right away. They suggested I spend about $100 for an oxygen removing machine so I could reseal the unused absorbers for use later in their own mylar bag. I thought that was a dumb idea. In any case, the oxy-absorbers are pretty cheap and I just try to get several new mylar bags and supplies ready at a time so not too many are wasted and then just throw away the rest. I got the impression they wouldn't last in the mason jar for a long period of time.
702293
No, they go to one temperature. They get pretty hot after just a few minutes so if you just want them warm, I'd say leave them in for about one-two minutes. Hope that helps!
304050
I have never used them in the fridge, I would be concerned that they would sweat if you were putting something dry in the container, so if you did I would make sure it is a liquid, ie. soup or something. Sorry I couldn't be more helpful.
40022
I've had mine for a while now and have had no problems with the seals or the pan. I've cooked everything from plain rice to chill. The chill I would leave on warm for most of the night.
415660
Have bought it for several years and there has never been a problem with it oxidizing. In fact, I am really surprised that anyone is even making such a comment that it does oxidize, because the pressurized container is air tight and one can only get the solution out by their special "contraption" that releases the solution. Could be the comments are coming from a competitor trying to attack the product, and maybe they are not familiar with the protective packaging. People do that you know (smile).