Reusable Ice Packs for Lunch Boxes & Coolers | Bento Lunch Box Freezer Packs for Work, School, Picnics & Camping | Small Cooling Gel Packs for Adults & Kids | Perfect for Keeping Food Fresh in Lunch Bags, Coolers & Travel Coolers

I needed ice blocks for my new lunch bag. I had a block that was small but thick. The reviews were good about these. I see why. There's four in the pack. Thin and sturdy. I put them in the freezer when I recieved them. Frozen solid the next day. I was able to use one on the bottom of my bag and one on top of the food to be kept cold. I like that becuase the other thicker block I could only use one. They fit well in my bag that I can lay 2 side by side and cover the whole bottom. They are still frozen, not as solid, after 5 hours. When I get home 9 hours after taking them out of the freezer they are still cold. A little condinsation on them and the bag but they do the job. I just throw them back in the freezer where they don't take up a lot of room. They aren't for really big cooler but for smallwr bags they work great. Would be a nice addition into kids lunch bags. You won't have to worry about kids eating a warm lunch that should be cold. Also good for meds that need to be kept cool.