How long do they stay cold?
1156758
I cut one apart and used it on my shoulder after rotator cuff surgery; seemed to stay cold for 1-2 hours that way. I use the solid ones in coolers when I travel and are still partially frozen after a 5 hour trip; work pretty good I think. Hope this helps.
1922303
Hi Kelly, the bags will NOT keep items cold for as long as you need them to. They will work for about 2 hours. I personally am not impressed by these bags the more I use them.
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.
788596
According to the directions I read, they will not stay warm that long. There are hand warmers that will stay warm up to 8 hours and you don't have to boil them, but they are not reusable.
1148581
put ice packs in mine. it is cold 9 to 10 hours later. If you preheat the thermos it will go just about 24 hours
217242
They are made of a double wall plastic. they do not sweat and keep ice for a long while.
1073631
I think that depends on the ambient temperature of your location and the type of cooler. I used them in a super insulated polar bear cooler (used to transport medicine) in sunny Italy and they lasted a total of 27 hours before the inside cooler temperature rose above 45 degrees F.
26451
We've only used them for 30 minutes at a time and they are still cold at that point.
445912
Normally I do not have them on longer than 20 min, But they are still pretty cold I would say at 30 min.
1080885
I suppose they sweat after a certain period of time. I put them in a small cooler of mine that I use like a lunchbox. But I use it as more than a lunchbox, really, because I like to have at least two meals with me at all times -- and they last all day -- i.e., at least 8 hours. But I suppose there are days when I don't get home for maybe 12 hours, and the stuff in my cooler is still cool. By then, the fit and fresh coolers are melted inside, but still cold. And obviously, sweating a bit. I just checked the stuff that I put in there at about 8:30 this morning -- almost 9 hours ago -- still cold. Hope this helps. I suppose they sweat after a certain period of time. I put them in a small cooler of mine that I use like a lunchbox. But I use it as more than a lunchbox, really, because I like to have at least two meals with me at all times -- and they last all day -- i.e., at least 8 hours. But I suppose there are days when I don't get home for maybe 12 hours, and the stuff in my cooler is still cool. By then, the fit and fresh coolers are melted inside, but still cold. And obviously, sweating a bit. I just checked the stuff that I put in there at about 8:30 this morning -- almost 9 hours ago -- still... » Read More I suppose they sweat after a certain period of time. I put them in a small cooler of mine that I use like a lunchbox. But I use it as more than a lunchbox, really, because I like to have at least two meals with me at all times -- and they last all day -- i.e., at least 8 hours. But I suppose there are days when I don't get home for maybe 12 hours, and the stuff in my cooler is still cool. By then, the fit and fresh coolers are melted inside, but still cold. And obviously, sweating a bit. I just checked the stuff that I put in there at about 8:30 this morning -- almost 9 hours ago -- still cold. Hope this helps. « Show Less
1968903
I have about a dozen of these that I have stored in my truck. I live in upstate NY where temps can drop well below freezing and into the single digits(both positive and negative) and have had them in there for about 3 years now. They freeze solid every winter and thaw every spring. None have popped.
1749397
about an hour or 2 depends on how cold the item was when you put it in there
1090485
Currently using it the required 20minutes following surgery but I would say it stays very cold about 45 min. Very moldable.
1172814
The packs stay cold for an hour or so; you may need to replace; however it's not medically advisable to leave a cold pack next to skin for over 20 minutes. I do, but I wrap it in a kitchen towel to avoid frostbite.
1355957
Yes, to both questions. They stay so cold oftentimes whatever is inside gets pretty icy. When I put room temperature liquid in it takes a few minutes to get it chilled but it eventually gets cold.
1067134
I use this in my daughter's lunch box and nothing in there needs to stay really cold. She eats only a few hours after it is packed. I can tell you that it is not still cold when she gets home about eight hours later. If these were used with the lunch bags that go in the freezer (which don't even require a cold pack) I have no doubt that everything inside would remain cold all day!
601247
We did put it in a cooler filled with ice until we got to the bee yard. The temp was 90 degrees and they didn't last but about 1 hour and 20 min. We put them back in the cooler and when we got to the next yard it was cool nothing more and did not keep us cool at all.