Having two school age kids that like to bring their own lunches, these are very cool.
I like how they are flat, and not a brick bouncing around the lunch box. They can rest under the contents with ease and keep their stuff cold. My package came with a stack of them, so there are plenty for the household. There is nothing complicated about these, and they are fun colors to keep it interesting.
Each one measures about 5” by 5” and they stack well with each other. I like them and would recommend them to others.