can they be made cold too
1180213
They can be put in the refrigerator. If you put in the freezer, you can not leave them in longer than 20-30 minutes.
1180214
I just came from a grocery store presentation of this product. For a cold pack they should be put in the refrigerator not the freezer. If put in the freezer they will burst like a can of soda. That's exactly what the factory rep. doing the demonstration said.
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
1471552
Yes. doesn't work as well as some cups that are designed for it, but I do like putting them in the freezer for a while before I have a cold drink.
1033054
I suppose it could be done......not sure about cooking them directly from a frozen state.
1597435
Yes, I wouldn't see why you couldn't. I never have, but it will keep it cold
717656
It should not be an issue. I am not sure what the cold rating is. It gets down to -20f here and they work fine.
2123207
i don ,t know why you cannot they are used for diesel engines in cold weather ,you will have to install it into coolant hose allowing water to be heated..
2218014
You could-it would keep them cold at least, but you run the risk of them going flat in a travel mug of any kind (is my experience!) hope that helps
2213421
I just leave them in the freezer until we need them. But they should be cold enough within an hour or two.
964862
In my opinion, I don't think they'd be able to. I use them in my kids' lunch boxes each day, and when they get home, the ice isn't even cold anymore.
2262072
No. You can turn the hot or cold on or off, but they come at a preset temperature.
967170
I've only used warm but that works very well. I don't see why cold wouldn't be the same.
1687047
I would think so but they don't have much in the way of insulation. Unless you got a bigger size where you could wear thick socks I would think your feet would get cold.
102100
LOL.......never did it and I don't suppose they would stay cold for very long (kind of like a piece of cloth) but a question I never thought of..........but, yes, you can pretty much put everything in a freezer....
1398416
No, this is to give a drink a "chill" like whiskey. If you pour a glass of soda and try to use 2 of these it will not cool it enough to be considered cold.
1871948
I haven't but I'm sure you can. I just wouldn't leave them frozen for an extended period. I love these for many different uses.
973425
I think they can. I haven't tried it myself but the standard plastic bottles can be frozen. Not sure?
208626
Sorry - I don't live in a cold-weather area so don't know. Ask the manufacturer.