Specifically crafted to retain heat, the CookTek Pizza Bag FlashPak is durable, effective and re-usable. Designed to be slip into a pouch within the Pizza Bag Charger, the FlashPak is suitable to both 406mm (16”) and 457mm (18”) size bags. Able to be re-used in subsequent replacement bags, this unit is long-lasting and provides great quality for money.