Great for small children
Great for small children, especially.  The packs are very stiff when they are frozen, but if pushed around a bit, become quite flexible. My children can (and do!) carry them around with them everywhere and manhandle them, and we've not had a leak yet.  They have a side with mesh that isn't as cold as the front side, perfect for soothing without too much cold, so I don't need to constantly find a cloth to put around it to protect their skin.
Rating: 5 stars