Below ZeroPrefilled Reusable Ice Packs for Coolers | Long Lasting Freezer Ice Blocks for Camping, Lunch Bags & More | 48 Hour Cooler Ice Pack Technology

I have a lunchbox that is larger than the standard size and this fits perfectly. It keeps food cold all day long and I dint have to worry about the food going bad. I highly recommend.

I live by a beach and coolers and ice packs are only so so. So far this keeps cold for a hot afternoon.

Bought this to ice an injury rather than to cool a container. The ice packs intended for first aid thaw very quickly, and when your mobility is limited, it’s great to have something that you can use off and on all day without getting up to got to the freezer over and over. It does freeze stiff, so would not be ideal for all injuries. I was using it on my back, and it was perfect for that use. It’s very thin, so not uncomfortable to lean back or sit on and the surface area is broad so you don’t have to move it around to treat a large area. It does sweat, so best to wrap in a towel.

Stays cold - although nowhere as long as described. But it's still a simple ice pack with no extra cooling powers. Mistakenly thought that with an extended cooling time, I would need fewer ice packs. The two large ones I purchased did not begin to do the job.

Work awesome. I had two in a cooler and they lasted 2 days.

Used this to take breastmilk on a cruise and I got it to be frozen the first 4 days in a fabric cooler, altho I had some help from other gel packs too I didn’t notice these needed so long in the freezer before use I only ordered them last min so they came just before the 24 hour mark of leaving so I only had that much time to freeze them before use I’m sure it would of been better if I kept it in freezer for 48 hours prior to use so keep that in mind ! No issues at airport with it frozen I did put in my checked bag on the way home because it wasn’t frozen anymore and didn’t want to risk losing it

I really like these ice packs. They do not leak and are able to keep things cold for hours. I have used them in a cooler and a lunch bag. In both instances my items remained cold after several hours. Very pleased with these ice packs. Save me from buying ice and my bags from leaking. Love it.

So it's just a bag with some sort of little crystals inside. If you're not careful you could accidentally pour them out. They work very nicely and keep cold a long time as advertised. But I've used them once and already two of them have holes from scraping against the freezer when I pulled them out. So now I have them inside of ziplock freezer bags and figure I just have to never ever let them unfreeze. Once they're frozen it just seems really easy to rip them without meaning to.