These is one new hard shell plastic small Lifcam Freezpaks that can go in the freezer and then can be used for coolers, insulated totes, etc. It is a reusable ice substitute. "Keeps your cooler content cold for hours." I bought this a couple of years ago, but never used them. I am downsizing and am selling most everything. Non-smoking household. The pak measures approximately 7" x 3 1/2" x 1 1/2". and weighs approximately 1 pound. I have seen it described as "lunch bag size". They are made in the U.S.A.