This product stays cool even when my son gets home from his after school activities. Keeps my lunch cool in my lunch bag through my 45min drive to work. I have a 24 can cooler that i put mine in nothing special just a doller general cooler.

It's easy to put them together like legos and create a much larger cooling area. The interlocking is also a great feature. The only negative is that sometimes they can expand a bit when freezing.

These ice packs are honestly great. They stay cold in my lunchbox for 8 plus hours! The only thing i found is that if your going to use them to form a box it best to do it before freezing.

The reason that this 10 pack of ice packs is so reasonably priced, is because they totally melt within 2 hours of putting them into a well insulated cooler. May work in a lunch box --if well insulated. But --these are tiny and do not stay frozen long....  Read More