VENNERLI 6/10 Packs Freezer Blocks for Cool Box Bags, Reusable Ice Packs Long Lasting BPA Free Durable Ice Cooler Blocks for Cool Lunch Box

I knew the available size of my sandwich box so I checked the description carefully. In two places 12.7cm is stated but they are approximately 13.6cm so don't fit.Another seller has an "identical" looking product with a description which says "upgraded to 13.8cm x 13.8cm". I think this product has been "upgraded" but the listing has not been updated. Returned "not as described".Have gone for a smooth flat design which is as described and a perfect fit.

Does what it says on the tin. Happy with the product and I like the fact that you can put the individual blocks together as a box to keep whatever it is you want kept cold within it. Lasts for up to 5 hours in a cool bag . Also shape is good - not too big and "fat" like the slimline as they fit easier into sandwich boxesReceived the goods promptly.

Very useful. The small size makes them easy to push into the corners of an already over full freezer! I only took off I star because I thought they were a little expensive.

Not to be used in coolboxes - this is designed for lunchboxes!

What a find these are! Bought for my boys’ school lunch boxes to keep yogurt, jelly, etc cool. You simply click them together like a jigsaw puzzle and you can make a cube, or just a wall. I’m about to buy another set as there aren’t enough to make two full cubes (2 boys!).

These are very poor quality! All end up leaking and expanding to strange shape when frozen. Would not rexommend and very expensive for what they are!

Sorry for the pun but, this does what its meant to do, they fit together and they keep my milk cold in my coolbag, just right for my protein shake at lunch. impressed.

What a genius idea! The kids loved putting them together and they are very versatile, I’m yet to test how long they stay frozen on a long day out though. I think the design is great though