Made of 18/8 stainless steel and filled with distilled water that freezes solid when pack is left in the freezer for 2 hours or more. It is safe to go right into your container, next to your food, as well as in your lunch bag next to your lunch containers. Will keep your lunch cool for 4-6 hours, depending on your containers and lunch bag. You can also use it for sore backs, bruises and bumps! Dimensions: 4 1/2" x 2 1/4"
Material: Stainless steel, distilled water
Made in Korea