The Everlasting Ice Rx Rapid Performance Reusable Ice Packs are a convenient and durable solution for keeping your meals cool in a cooler or lunch box. This 4 pack comes in a new in box condition, guaranteed to provide a long-lasting cooling effect. Made of nylon reinforced aluminum, these ice packs offer a faster cooling performance compared to traditional ice cubes, ensuring your food stays fresh for longer periods of time. Easy to use and reusable, these blue ice packs are perfect for outdoor activities and on-the-go meals.