The Hard Ice Patterns from Thermos® extends the cold retention of any insulated lunch box — particularly important for dairy, proteins, and fresh produce that need to stay below 40°F from morning pack to lunchtime. Freeze overnight and place in the lunch box the morning of use. BPA-free, reusable, and safe for food contact. For maximum cold hold: pre-chill the empty lunch box in the refrigerator for a few minutes before packing, add the frozen ice pack and cold food together, then close the bag. The combination of a pre-chilled box and Thermos® hard ice keeps food at a safe temperature through a full school or work day. How long does Thermos® Hard Ice keep food cold? Significantly longer than standard gel packs — freeze overnight and use with an insulated Thermos® lunch box for maximum cold hold. BPA-free, reusable, food-contact safe. Shop all Thermos® Kids, or view best sellers
