18 Cube Reusable Ice Mat (12" X 9") - For Coolers, Lunchboxes, First Aid (Pack of 2) Pack of 2 - Freeze one while you use the other Non-toxic - Contains purified water Use in 6 - 18 can coolers, food carriers ("potluckers"), lunchboxes, and lunch bags Larger surface area allows more items to stay cold Use for First Aid - Ice knees, shoulders, etc.