Dynamic Gear Reusable Ice Pack Blocks, 6 Pack | Slim, Lightweight, Portable Freezer Block | Cooler Ice Packs for Lunch Box/Bag, Cool Bag, Fishing Box, Picnic Bags | Travel, Sport, Camping Gear Coolers

These are great for our lunchboxes, very well made, freeze quickly and last a long time when I use.

Great item to keep lunchboxes cold. Nice slim design so as not to take up too much space

Very pleased. Narrow enough to fit into plastic containers and great for lunch boxes

Worked really well at keeping my drinks and lunch cool in my cool bag on a 5 hour train journey. They stay cold and frozen for a long time.

Great ice packs and what a great price. Quality is very good for the price, they are just the right size and shape for my needs.

We use these in our little cooler. Great size and fits most kids' lunch packs. They stay cold for quite a long time too, but I wouldn't recommend beyond 8 hours for perishables.

Really handy for the smaller cool bags, real value for money depending on quality of your cool bag lasts a long time.

Compared to a simple gel block that you can buy from the big discounters they last half the time. I ordinarily purchased these as their selling point was slim and smaller profile, however this comes at the cost of them not staying cold as long as a traditional block. Are they slim and good for small lunch box’s? Absolutely, do they last to midday? Not really. I have to use two or more which kind of defeats the object.