How to use them? Do I need to put them in the freezer before packing it in the box?
622683
Yes leave it in the freezer when you are not using. When the liquid inside the pack becomes solid, then pack it in the box.
622684
Only one person on here is right, these packs stay cold forever without refreezing them. Anyone who keeps them in the freezer is just wasting energy. They use nano-size perpetual motion devices as minature a/c units and vent through osmosis.
622685
You need to put them in the freezer until they are frozen, and then use them to pack a lunchbox or cooler!
622686
Yes, you have to freeze them. They are just like any other Ice pack, but about the size of a slice of bread. There are four in a set, and work well.
622687
Yes, they're just like all of the other ice packs you throw in the freezer - just a different shape that fits better into lunch bags.
622688
No. Not at all, the other posted answers are wrong. These packs stay cold forever. You never need to 'refreeze' them, as they are eternally cold.
622689
Yes, put them in the freezer overnight and they're ready the next morning. I put one on the bottom of her lunchbox and one on top to keep things cold till her lunch break at school. These are very sturdy and wash easily.
1822883
Personally, I wouldn't use them in the freezer. They are steel-mesh, therefore, metal, so there's a couple places I wouldn't recommend using them: someplace extremely hot or someplace extremely cold. I have used covered wire shelving in my freezer quite successfully. I put cardboard over them when using ziplock bags so they freeze flat and not with slots where they have fallen through the wire shelf. Hope that helps.
1180215
I have not tried to put them in the freezer. I am writing this to you as I sit next to the pile of used ones that need to be heated again to make them liquid, they become solid after use. That pile has been there for several weeks. Really not worth the money. I would not buy these again, they are a total pain. If after you heat them if there is even one crystal left, this can be very hard to see, they will just reheat when you take them out of the hot water and you are stuck heating them again to reset. They do not stay warm for nearly long enough to make them worth it. I would strongly urge you to skip these and go with an old fashioned water bottle. Sometimes an oldie is a goodie. I have not tried to put them in the freezer. I am writing this to you as I sit next to the pile of used ones that need to be heated again to make them liquid, they become solid after use. That pile has been there for several weeks. Really not worth the money. I would not buy these again, they are a total pain. If after you heat them if there is even one crystal left, this can be very hard to see, they will just reheat when you take them out of the hot water and you are stuck heating them again to reset. They do not stay warm for nearly long enough to make them worth it. I would strongly... » Read More I have not tried to put them in the freezer. I am writing this to you as I sit next to the pile of used ones that need to be heated again to make them liquid, they become solid after use. That pile has been there for several weeks. Really not worth the money. I would not buy these again, they are a total pain. If after you heat them if there is even one crystal left, this can be very hard to see, they will just reheat when you take them out of the hot water and you are stuck heating them again to reset. They do not stay warm for nearly long enough to make them worth it. I would strongly urge you to skip these and go with an old fashioned water bottle. Sometimes an oldie is a goodie. « Show Less
1153663
They aren't packed in any way to keep them cold, I just put them in the refrigerator as soon as we get them.
214737
They are very good to use as canisters. I would not put them in the freezer.
239453
I just keep them in a cooler room, I think freezing may make them mushy. Fridge might be alright although I haven't done that. I use it every day in my protein shakes so doesn't sit around a long time..just looked at the pkg. and says to refrigerate, guess I will be keeping it there from now on
343660
I did soak them in WARM water. About 15 min. Then dry them with the towel and put them in the freezer.
829493
depends on how soon they will be used... soon? you can put them in the cupboard.. any time in the future I'd put them in the fridge or freezer - the freezer will keep them longest
1161939
The bags that you don't use you should reseal in a bag or heat seal(I just put them in a freezer bag...) so they stay fresh. The ones you put in your safe you just drop in.
340936
I haven't tried ..... But would also like to know if they are safe for freezer
985292
Deb, I did freeze them since I purchased 4 pkgs--it was fine I had no problem and they defrost quicklythey are delicious ---oh and I had them in the freezer for about 3-4 months
1866630
Absolutely. They are great in the freezer. I use them that way all the time.
2064157
I guess some of the sites do send them on ice, this particular site did not. I called and they said it is ok, to just put them in the refrigerator when I receive them. Maybe they are not as potent if left out? Not to sure, but I have had no problems so far.
760209
I would think you could...but I would pack the in an upright position, but that is is me and I might consider dry ice, I believe it is colder. It would also depend on the temp outside and will you be able to put them in a freeze when you arrive, before serving them.
1700317
I buy them in bulk and put them in the freezer. I'm not sure how long they will last in the bag.
2213421
I just leave them in the freezer until we need them. But they should be cold enough within an hour or two.
621813
I do not have a direct answer but if I froze them I would open them and dump them out in a ice cube tray and freeze them that way. Reason being I am not sure that the plastic container is designed to be frozen? or rated to be frozen. Just my 2 cents maybe some one will chime in their thoughts to help answer your question.