These hot cold bags are an ideal solution to keep your warm food warm and cold food cold, be it seafood, fruits, drinks, milk, sandwiches, pizza, salads or other things. Keep food at desired temperature for hours. Made up of Aluminum film, foam paper, which are all food-safe. Lightweight, moisture proof, shock proof and thermal insulation. The zip lock offered by the bag ensures that your food is certainly kept at the desired temperature and as fresh as you would want it to be. (If you put the ice pack in the bag, the effect of heat insulation or cooling will be maximized.) 9 27/32" W x 13 25/32" H