If used inside an insulated foam container, how long will these continue to operate near peak value?
1509153
For long lasting ice, save your 16oz water bottles. Fill them almost full with water and leave the cap just a little loose and put them in the freezer. When frozen securely tighten caps. Use the frozen bottles in place of ice cubes to keep an ice chest cool and they will last DAYS, and you can finish them off as ice water. I've done this for years and it' amazing how long they remain frozen.
1509154
These would NOT be your best bet. These are designed to last about 20 minutes to help reduce swelling from an injury. They are GREAT for that. You need the ice packs filled with gel that you freeze and remain cold for many hours. Hope this helps. Joe
1509155
About 1 1/2 to 2 hrs. I used it for my lunch cooler and that's about all u get
1081267
It depends on the situation. In a sealed container with no extra source of moisture, indefinitely. In my incredibly damp garage about 30 minutes. They can be "reactivated" by baking in the oven and I have been experimenting with using low power settings in the microwave with some success. (full power causes them to "Snap, crackle, and pop). I also bought some of the little humidity indicator cards so I can monitor the humidity in my containers.
1584988
The can contains inert gases. They won't wear out, though the can may eventually leak. I venture that would take a *long* time. This is an *excellent* product. It's much better than using a vacuum pump, for example.
800669
Just a guess would be around 30 or so . One container will last me for 3 to 4 months .
1925682
As long as you want as long as where ever you keep them isnt in a moist enviroment otherwise they'll breakdown
730219
In a closed freezer (assuming the power is on) they would last indefinitely- with the power off, I would think they would last weeks assuming the freezer is in a cool spot indoors.Freeze them as long as possible, at least 24 hours works best for me. But they do freeze in about 3 hours or so.
1777887
I find better performance when stored at a steady room temp. Between 68 & 74 degrees Fahrenheit. Extreme cold or heat for long periods will lessen performance and longevity. Heat especially can cause leakage. (Don't leave them in your flashlight, in your car repeatedly for week after week in July and August).
871661
Carole, I think the longest I tested mine was 2 weeks, but I live in a very dry region. I filled fairly substantial receptacles and covered them with foil to slow evaporation. I will be using them for a couple of weeks again now, but I have a friend coming to check on plants as a back up. I know this doesn't help much. A lot depends on house temps and humidity...as Irene mentions.
1026663
I would think they would get saturated almost immediately. These work best in sealed environments.
1084045
I called the manufacturer and was told that as long as the product is stored at temperatures under 100 degrees F and not exposed to humidity that it should remain viable for at least 10 to 15 years.My container is over 10 years old and is still effective. I would transfer it to a different container for long-term use though because our original container developed a crack over the years.
1064840
A long time. They are built really good. Now the problem you will have is the battery. For long storage take the battery out of the housing. Keep it Dry and you should be able to use many times. I suggest you buy some extras batteries.
2165968
I agree completely with K.P. but because I only use mine for company it lasts a very long time. As long as it is stored air tight you'll have no problem! Enjoy!
566778
I have used mine for at least 4 hours. After 6 or 7 years it still lasts over 2 hours.
1537783
I use two of them to keep a 24 cubic ft cabinet dry. They work for about 3 months, then need to be baked per instructions. Check them every month and when the color changes, bake them!
139797
So long as it is in the fridge, the bubbles will last for a lot longer. Obviously, the colder the better, but if you have a decently cold fridge, you should have a couple of weeks, at least. I usually charge it, tilt it side to side for a bit, then put it in the fridge. I tilt or shake it just before use, as well. I use a little at a time, and it always seems to have fizz.
1211299
If kept in an air tight container it will keep indefinitely. I have had some last several years with no problems
1044499
I just checked for metrics - I use a little less than 100 ml and it foams perfect! Yes, I've rewhipped on the rare occasion that I want a second cup, and refrigerated until the next day (& rewhipped).