MIER Ice Cooler Packs will keep your food and drink chilled longer! You can reuse the ice pack over and over. The long-lasting ice pack help to keep your food and drinks cool & fresh until you are ready to eat. The cooling performance would be better if paired with insulated lunch boxes/bags, cooler bags, grocery totes, or other bags. The powerful freezer packs are thin enough to fit and don't take up too much room. Return them to the freezer after using and they'll be ready for your next outing.