For carrying cold or hot items. The interior is made of aluminum material for cold retention. Comes with a handle that is easy to hold, so its great for excursions and club activities. The large gusset allows you to store 2 triangular rice balls at a convenient store. In addition to rice, we recommend storing fruits, salads, chocolates and candies that you want to "cool" in. Includes 1 ice pack (frozen); Product Size: Approx. H 3.7 x W 4.1 x D 3.5 inches (9.5 x 10.5 x 9 cm).