Ice Packs That Stay Cold For DAYS Cooking, Kitchen, Storage camping, food, kitchen stuff, storage stuff, techni ice, travel September 20, 2023 at 7:25 pm September 20, 2023 | Author: SimplyGoodStuff Don’t use regular cubes or ice packs if you want to keep stuff cold for long periods. Use this stuff instead to keep food and other perishables cold and fresh for days.