New Unopened Mitsukoshi Original Lunch Bag Polyester material / Aluminum vapor deposition sheet Size: Approximately 16cm wide x 23.5cm high x 11cm depth The lining is made of aluminum, which seems to have a cooling effect. It has a zipper closure and seems easy to use. It's simple and has a cute pink accent. I received this as a gift, but I have many cooler bags, so I'd love for someone who is looking for one to have it!˚+⁎ Due to shipping costs, it will be folded for delivery.