How long do they stay cool?
390830
Sorry I got these for my husband as a Christmas present and he hasn't used them yet.
2171552
It varies. On a normal 70-90 degree day, kept out, it usually lasts 6-8 hours or more. The ice cubes will have melted some. Even when they have all melted, the water is still cool. In a hot car, an hour or two, but I live where the temps can rise considerably, so a lot will depend on where you live and the time of year. Also, make sure to fill thermos with cool to cold water. Warm water will start to melt the ice right away.
251384
I keep them in an air tight container and they last for at least a couple of months. They lose a little bit of moisture but all in all, they are still good! I bought mine in early December and they are still good today!
730218
They stay frozen for 20-24 hours; freeze them until hard and they are good to go.
453572
I had mine on at an event for up to 8 hours after I first got them and they never seemed to get too hot. If you feel they are getting too hot you may have a defective unit.
2243940
they take about an hour to re freeze, however they dont stay cold for very long.
730221
I keep them in my freezer. They usually stay cold for two days in a cooler. I also using them when I need to put ice on my knee or on my back.
1304009
I have kept them at regular room temperature for as long as 3 and 4 months and they seem to be absolutely fine. Never kept it longer than 4 months, so I wouldn't know beyond that.
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.
180319
Not a all ...matter of fact stays cool......I keep it on for a couple of hours
861459
They stay colder longer because of the silver backing. They are equally as durable.
1661797
It depends on the temperature that you store them at. regular room temp they are good for between 5-6 years. in the fridge they are good for 7 years. In the hot desert sun they are good for a year or less.
1111056
I would say a few weeks, depending where you put them. If you have them in a rather air-tight container, they last a very long time...if there is air exchange, they obviously won't last as long. I like them a lot but I did have one go bad on me...when I was re-charging...for some odd reason, the balls turned black...rendering that one useless...the others that were in the same condition and were heated for the same time did just fine...
762931
Mine stay warm about 1 hour if I use them indoors and about 30-45 minutes if I use them outside in the cold.
2069312
Depends on the temperature of where they are stored. A stable 50-60 degrees should give 10 years at least. Wild temp flux or higher storage temp can reduce it down to 3 or 4.
1461468
Actually, about 25 minutes..I used it for 8, but by the time I put them back in the fridge, more time had passed and they were still cool!
1544881
indefinitely I believe. It doesn't take long to get them cold and they seem to stay cold/cool for at least an hour. I purchased two, so one is always ready.