great price, seems to work ok

Best Review on UPG GP1272 1272 BATTERY 7 2AH

It's Blue Ice, the stuff that has been around for what seems like forever. There's a reason why this stuff has been around for a long time, and it's because it works awesome. I'll put one or two of these (winter/summer) in my lunchbox and it'll keep my meal nice and cold all day long. I tried some of the new Thermos Ice Cube Mats, but they leaked on the second day and then on the third day, so I threw them out.

Some folks might not like that these are filled with a chemical (propylene glycol), which is why it stays frozen/cold for so long. If you're looking for a water-only ice packet, I know the Thermos ones only contain water, but their durability is questionable. Also, these stay frozen significantly longer than water-only packets.

The color of the liquid in these packs has changed. They are now LIGHT BLUE as compared to the dark, dark blue they used to be for the last 20-30 years. Some folks had an issue with the dark dye getting on them if they leaked, but now the dye is so light that I don't really think it's much of an issue anymore. Well, as long as you're not wearing white. The liquid inside also used to be like water, but now it is more gel-like, so even if you do have some sort of rupture, it's not going to "drain out". When it's completely unfrozen, it has a thick and viscous consistency. I put one of these new Blue Ice packs in my lunch box with their old version, and the new version was still partially frozen while the old version was completely unfrozen. When I noticed that, I upgraded all my old Blue Ice packs to the newer kind.

I've gotten anywhere from 2-5 years of use out of these packs, and that's using them daily taking my lunch to work; great durability. You'll get the most longevity out of them if you freeze them flat, without any creases in the plastic. I've had nothing but good experiences with Blue Ice.

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