Ice Packs for Coolers - MIER Large Reusable Frezzer Packs for Lunch Box Bags Long Lasting Blue Ice Blocks, Pack of 2

Ummm, these are pretty nice. Their size is perfect for using in our kid's PlanetBox lunchbox carry bag, and they're not too heavy. It's more robust than the flimsy ice bubble packs that PlanetBox sells. I looked at all the competitive products and these dimensions worked best for our needs. It seems to keep things cool well, but I haven't done a time test. What I don't get is how the lids pop off. They don't tighten, but are just pressed into place. At first it concerned me, worrying that it might leak into my kids food, but then I saw the product description states "The lid is added only for decorative not for utility, lids can be unscrewed and removed." Why not just fix the lid in place, add some threads or do away with the lid altogether and designing it with a more permanently sealed top? Weird to me.

These are a standard height, but are half-width, making them a bit more versatile when you're trying to keep a variety of items cold that are different heights. I am NOT using them for camping, so cannot attest to how long they stay frozen. However, once frozen solid I had one out at room temp, about 70 degrees, for 5 hrs, with almost no softening. I'm satisfied with the purchase.

It fits easily in the freezer & keeps items cold in the small ice chest we use.

I absolutely loved it. The size is perfect for my travel ice bag. Excellent quality and most importantly the slimness makes it super easy to store. It definitely exceeds my expectations. Highly recommended.

These are functional, but I prefer the shorter and thicker ones that fit into a small cooler better.

Kept good cold as expected

I got these for my husband's lunch and they work awesome! He works outside for the most part in California heat and these keep his lunch cold all day. When he gets home and I unpack his lunch, the ice packs are still cold and keep his leftovers cold. I also like the slim design, giving more room in his lunch pail. I'd buy again if needed.

I love these packs. Bought 6. They stay frozen for 6 hours. My cooler (20L) stays indoors so I’m not sure how they’ll stand up in warm weather. These packs perform nicely for me. I recommend them.